| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| The abolishing of death | | 1919 | Basil King | |  | | | |    
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| Acredios: the veil lifted | | 1921 | Mrs. Elfrieda Neville, Mrs. Mary Alice Mortensen | | | |  | |
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| The adventure beautiful | | 1917 | Lilian Whiting | | | | | |
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| The adventures of a modern occultist | | 1920 | Oliver Bland | | | | | |
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| Afterworld effects | | 1922 | Clyde S. Ricker, Karl M. Leute | | | | | |
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| All the spiritualism of the Christian Bible and the Scripture directly opposing it | | 1922 | E. W. (Eli Wilmot) Sprague | | | | | |
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| Are mediums really witches: or, The vexed question of spiritism | | 1927 | John P. Touey | | | | | |
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| Avant | | 1928 | Maurice Clark |  |  | | | |
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| An awakening to the universe | | 1927 | O. A. (Ole A.) Ostby | | | | | |
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| The battle-ground of the spiritual reformation | | 1882 | S. B. (Samuel Byron) Brittan | | | | | |
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| Best books on spirit phenomena, 1847-1925: notes describing representative volumes; belief--unbelief--disbelief | | 1925 | Henrietta Lovi | | | | | |
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| The Betty book | | 1945 | Elizabeth Calvert (Grant) White, Stewart Edward White | | | | | |
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| The Betty book: excursions into the world of other-consciousness | | 1937 | Mrs Elizabeth Calvert (Grant) White, Stewart Edward White | | | | | |
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| Beyond our ken | | 1930 | Mrs Arthur Stallard | | | | | |
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| Beyond the eyes of man | | 1932 | Alonzo P. Mathewson, Helen Wells | | | | | |
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| Beyond the river | | 1918 | Lucelia A. Lovejoy, J. D., Lewis Peterson | | | | | |
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| Beyond the valley: a sequel to "The magic staff": an autobiography of Andrew Jackson Davis | | 1885 | Andrew Jackson Davis | | | | | |
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| Birth through death | | 1920 | Albert Durrant Watson, Louis Benjamin | | | | | |
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| The book of Clifford, or, "The soul of my son speaketh to me" | | 1922 | Lillian Bernicie, (Spirit) Clifford Bland | | | | | |
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| Book of revelations | | 1922 | Carloyn Spencer Halsted | | | | | |
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| A brief course in mediumship | | 1915 | George Winslow Plummer | | | | | |
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| The bundle of life | | 1934 | Jane Revere Burke, William James | | | | | |
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| Can the dead communicate with the living! | | 1920 | I. M. (Isaac Massey) Haldeman |  | | | | |
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| Case studies bearing upon survival | | 1929 | John F. Thomas | | | | | |
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| A cavalcade of the supernatural | | 1939 | Harold H. U. Cross | | | | | |
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| The cave of the oracle | | 1916 | L. W. (Lauron William) De Laurence | | | | | |
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| A ceux qui souffrent, aux âmes désemparées | | 1928 | Léon Wauthy | | | | | |
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| The church and spiritualism | | 1933 | Herbert Thurston | | | | | |
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| The classic of spiritism | | 1922 | Mrs. Lucy McDowell Milburn | | | | | |
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| A cloud of witnesses | | 1920 | Anna De Koven, James H. Hyslop | | | | | |
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| The coming light: sequel to The thining of the veil | | 1925 | Mrs. Mary Bruce Wallace | | | | | |
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| The coming light: sequel to The thinning of the veil | | 1925 | Mrs Mary Bruce Wallace | | | | | |
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| Communication with the spirit world | | 1932 | Johannes Greber | | | | | |
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| Completo devocionario espiritista | | 1926 | Allan Kardec |  | | | | |
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| The continuity of life | | 1933 | Anna Louise Benedict | | | | | |
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| Cosas del espíritu | | 1929 | |  | | | | |
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| Cure through suggestion | | 1933 | Mrs Helen Churchill Smith Lambert, Eileen Jeanette Lyttle Garrett | | | | | |
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| A curious life | | 1929 | Talbot Mundy, George B. Wehner | | | | | |
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| Død!: Hvor er din brodd? | | 1933 | Ludvig Dahl |  | | | | |
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| The darker drink | | 1922 | Marietta Minnigerode Andrews | | | | | |
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| The dawn is come | | 1934 | Mrs Fannie Francis Alpi, Mrs Mary Alice Mortensen | | | | | |
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| The dead | | 1926 | Jules Guyard | | | | | |
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| The dead have never died | | 1917 | Edward C. (Edward Caleb) Randall | | | | | |
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| Dedication: being later letters from the writer of "Reality." | | 1935 | Frances Parkman | | | | | |
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| Den ukendte: et indlæg til drøftelse af aandslivet | | 1926 | Laurs Nielsen |  | | | | |
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| Der okkultismus im modernen weltbild | | 1921 | Traugott Konstantin Oesterreich |  | | | | |
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| Der physikalische Mediumismus | | 1925 | W. v. (Walter von) Gulat-Wellenburg, Graf von Carl Ludwig Friedrich Otto Klinckowstroem, Hans Rosenbusch | | | | | |
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| Der verkehr mit der geisterwelt: seine gesetze und sein zweck | | 1932 | Johannes Greber | | | | | |
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| The descending light: a series of lessons from higher intelligences on the philosophy of life | | 1922 | Josephine M. Brace | | | | | |
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| Development of mediumship | | 1919 | Mrs Cecil M. Cook, Lloyd Kenyon Jones | | | | | |
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| Devilish but true | | 1936 | Harold Dearden | | | | | |
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| The diary of a spiritualist: together with comments on the happenings therein described | | 1930 | John B. Reimer | | | | | |
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| Did Joseph Conrad return as a spirit? | | 1932 | Jessie Conrad, Cyril Clemens | | | |  | |
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| Die Geisterhypothese des Spiritismus und Seine Phantome | | 1891 | Eduard von Hartmann | | | | | |
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| Die intellektuellen Phänomene | | 1925 | Richard Baerwald | | | | | |
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| Die okkulten tatsachen und die neuesten medienentlarvungen | | 1925 | Rudolf Lambert | | | | | |
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| Die physikalischen phänomene der grossen medien | | 1926 | A. von (Albert) Schrenck-Notzing | | | | | |
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| Die Toten leben: eigene Erlebnisse | | 1935 | H. (Hinrich) Ohlhaver | | | | | |
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| Die weltweisheit des schlichten menschen (richtlinien) | | 1927 | Otto. Knappe | | | | | |
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| The direct phenomena of spiritualism : speaking, writing, drawing, music, & painting : a study, with facsimile illustrations of direct writing, drawing, and painting | | 1908 | Edward T. Bennett | | | | | |
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| Divine inspiration: psychic research of the great beyond | | 1916 | J. W. (John West) Williams | | | | | |
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| Divine revelations: messages dictated by the divine planetary spirit rulers and their messengers | 1st ed. | 1922 | John F. Sanders, Ernest Haberstroh | | | | | |
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| Divine science | | 1920 | Almadora Mead. Robinson | | | | | |
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| Do the dead depart?: and other questions | | 1908 | E. Katherine (Emily Katherine) Bates | | | | | |
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| Do we live again?: Man the molecule, phantasmal thanatology, by Charles Edgar De Anguèrre | | 1922 | Charles Edgar De Anguèrre | | | | | |
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| Does telepathy explain spiritualism? | | 1920 | Francis K. Baxter | | | | | |
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| "Dorio" | | 1926 | Frederick A. Kraft | | | | | |
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| "Dorio" | | 1933 | Frederick August Kraft | | | | | |
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| The drama of life after death | | 1932 | George Lawton | | | | | |
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| The Ear of Dionysius | | 1920 | Earl of Gerald William Balfour Balfour, F. M. (Florence Melian) Stawell | | | | | |
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| The earthen vessel | | 1921 | Pamela Glenconner, Sir Oliver Lodge, viscountess Pamela (Wyndham) Grey Grey | | | | | |
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| The edge of the unknown | | 1930 | Arthur Conan Doyle | | | | | |
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| The either--or of spiritualism | | 1928 | Mrs. St. Clair Stobart, M. A. (Mabel Annie) Stobart | | | | | |
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| The encyclopædia of death and life in the spirit-world : opinions and experiences from eminent sources | | 1900 | J. R. (John Reynolds) Francis | | | | | |
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| Enroute of a soul | | 1925 | Catherine Wellner | | | | | |
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| Essai de revue générale et d'interprétation | | 1925 | Gustave Géley | | | | | |
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| Eternal life: a historical analysis of the relation between Christianity and spiritualism | | 1939 | Albert Hyma | | | | | |
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| Eternal verities | | 1937 | Mrs. Marcella DeCou Hicks | | | | | |
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| Experiences from "Over there" | | 1933 | Lois. Sherman | | | | | |
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| Experiences with mediums | | 1934 | J. Arthur (John Arthur) Hill | | | | | |
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| Experiments in psychics: practical studies in direct writing, supernormal photography and other phenomena, mainly with Mrs. Ada Emma Deane | | 1939 | F. W. Warrick | | | | | |
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| Fear not the crossing | | 1920 | Gail. Williams | | | | | |
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| Fifty years in psychic research: a remarkable record of phenomenal facts | | 1928 | Joseph Franklin Snipes | | | | | |
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| The foundations of spiritualism: by W. Whately Smith | | 1920 | W. Whately Smith, Whately Carington | | | | | |
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| Four modern religious movements | | 1919 | Arthur Haire Forster | | | | | |
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| Fox-Taylor automatic writing, 1869-1892 | | 1932 | William George Langworthy Taylor, Sarah Elizabeth Langworthy Taylor, Mrs. G. H. | | | | | |
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| From beyond | | 1930 | John Clair Minot, Mrs. F., Mrs. XXX F. | | | | | |
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| From the land o' the leal | | 1915 | Lillie McGinnis | | | | | |
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| Frontiers of the after life | | 1922 | Edward C. (Edward Caleb) Randall | | | | | |
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| The fundamental facts of spiritualism | | 1927 | A. Campbell Holms | | | | | |
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| The gateway of understanding | | 1934 | Carl August Wickland, Mrs Nelle Minnetta (Yates) Watts, Mrs Celia Loretta (Krehbiel) Goerz | | | | | |
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| Gennem døden | | 1926 | Anna Hude | | | | | |
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| Ghosts I have talked with | | 1935 | Henry Clay McComas | | | | | |
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| Ghosts of the Bible | | 1922 | Converse E. Nickerson Everett, Converse Ennis Nickerson | | | | | |
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| The gift of healing and spiritual science as taught by Christ | | 1913 | Adelaide Arnold | | | | | |
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| Gleanings from the rostrum | | 1892 | A. B. (Almon Bruce) French | | | | | |
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| A glimpse of spirit land | | 1930 | Louise Sumner Cobb | | | | | |
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| God's smile | | 1920 | Julius Magnussen, Daniel Kilham Dodge | | | | | |
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| God's world... : a treatise on a spiritualism founded on transcripts of shorthand notes taken down over a period of five years, in the seance-room of the William T. Stead Memorial Center (a religious body incorporated under the statutes of the state of Illinois) Mrs. Cecil M. Cook, medium and pastor. | | 1918 | Mrs. Cecil M. Cook, Lloyd Kenyon Jones | | | | | |
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| Goddena, the unknown god | | 1917 | Simeon Henry West | | | | | |
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| Gone west | | 1919 | H. M. G., M. M. H. With, Frederick W. Kendall | | | | | |
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| The great beyond | | 1933 | | | | | | |
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| The great known | | 1928 | J. E. (John Emmett) Richardson | | | | | |
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| The great psychological crime: the destructive principle of nature in individual life | | 1928 | J. E. (John Emmett) Richardson | | | | | |
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| The greater revelation | | 1925 | Katharine (Evans) baroness Von Klenner | | | | | |
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| Guds dag | | 1921 | Julius Magnussen | | | | | |
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| Guds smil | | 1920 | Julius Magnussen | | | | | |
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| The guiding power | | 1929 | George Starr White | | | | | |
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| Hartmann's who's who in occult, psychic and spiritual realms | | 1925 | William C. Hartmann | | | | | |
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| Healing forces | | 1919 | Mrs Cecil M. Cook, Lloyd Kenyon Jones | | | | | |
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| The higher spiritualism: the philosophy and teachings of spiritualism from the point of view of accepted philosophy and science | | 1927 | John Calvert Leonard | | | | | |
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| Histoire du spiritualisme expérimental | | 1927 | Cesare Baudi di Vesme | | | | | |
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| The history of spiritualism | | 1926 | Arthur Conan Doyle | | | | | |
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| The history of spiritualism | | 1926 | Arthur Conan Doyle | | | | | |
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| Holy Theomonistic Bible, or, The evolutionary Gospel of fulfilment of prophecy, which John calls the bitter and sweet open book and everlasting Gospel (Revelation 10:1, 7, 9, 14:6): being the authentic continuation and consummation of the Jewish and Christian Bibles and other sacred books : namely the testament of God with men of today and all the future in the Psychic Age or Theomonistic Era, which started 1916 A. D | | 1920 | H. P. (Helmuth Peter) Holler, Louise Wilhelmine Vest Holler | | | | | |
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| Houdini and Conan Doyle: the story of a strange friendship | | 1932 | Hereward Carrington, Bernard M. L. (Bernard Morris Lee) Ernst | | | | | |
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| Hours with the ghosts : or, Nineteenth century witchcraft. Illustrated investigations into the phenomena of spiritualism and theosophy | | 1897 | Henry Ridgely Evans | | | | | |
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| How I discovered my mediumship | | 1919 | Mrs Cecil M. Cook | | | | | |
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| How I know that the dead are alive | | 1917 | Fannie Ruthven Paget | | | | | |
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| How to hold circles for developing mediumship at home | | 1920 | Franklin Alonzo Thomas | | | | | |
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| Hydesville in history | | 1917 | M. E. (Mary E.) Cadwallader | | | | | |
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| Hypnotism and spiritism: a critical and medical study | | 1907 | Dr. Joseph Lapponi, Mrs. Philip Gibbs, " Agnes Mary Rowland "Mrs. Philip Gibbs Gibbs | | | | | |
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| Hypnotisme et spiritisme | | 1910 | Cesare Lombroso, Charles Rossigneux | | | | | |
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| I predict | | 1995 | Herman Halpern | | | | | |
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| Immortality: an essay in discovery, co-ordinating scientific, psychical, and Biblical research | | 1917 | Cyril W. (Cyril William) Emmet, A. (Arthur) Clutton-Brock, L. (Lily) Dougall | | | | | |
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| Immortality and the cause of spiritualism | | 1934 | George Edwin Frost | | | | | |
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| The immutable law: being messages on thought projection, mental control and the present crisis in human affairs | | 1936 | T. (Thomas) Troward, Mrs. Jane Revere Burke | | | | | |
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| The imperative conquest | | 1936 | Titus Bull | | | | | |
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| In the beginning: a book for the new era | | 1910 | Mrs Emily W. Mead | | | | | |
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| In yellow light | | 1928 | Hugh H. Hillman | | | | | |
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| Inevitable voyage | | 1935 | Mrs. Dora Drane | | | | | |
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| The inner voice reveals | | 1943 | Lewis Hobart Sweetser | | | | | |
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| Inside the medium's cabinet | | 1935 | Joseph Dunninger | | | | | |
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| Insight; a record of psychic experiences: a series of questions and answers dealing with the world of facts, the world of ideals and the world of realities beyond death | | 1918 | Emma Crow Cushman | | | | | |
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| Instructions et recueil de prières | | 1934 | Allan Kardec | | | | | |
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| Introduction to the writings of Andrew Jackson Davis | | 1930 | James Lowell Moore, Andrew Jackson Davis | | | | | |
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| Is death the end? | | 1928 | John Henry Remmers | | | | | |
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| Is this Wilson? | | 1929 | Edward S. Martin | | | |  | |
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| Isaiah as read by a clairvoyant | | 1937 | Margie Austin Cole | | | | | |
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| James H. Hyslop--X: his book, a cross reference record | | 1929 | Weston D. Bayley, Gertrude Ogden Tubby | | | |  | |
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| Jewels of truth | | 1920 | Grace Lobach Steinke | | | | | |
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| Jo, the Indian friend | | 1925 | Clara Helen Whitmore | | | | | |
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| The job of living | [1st ed.] | 1948 | Susan C. Kimmell, Stewart Edward White | | | | | |
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| Katie Fox, epochmaking medium and the making of the Fox-Taylor record | | 1933 | William George Langworthy Taylor | | | | | |
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| La foi nouvelle | | 1925 | Henri Brun | | | | | |
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| La médiumnite polyglotte (xénoglossie) | | 1934 | Ernesto Bozzano | | | | | |
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| La religión espiritista | | 1924 | Juan Laguía Lliteras, Th. (Thomas) Mainage | | | | | |
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| La science et le spiritisme: Jésus et sa mission. Conférences faites à la Société Allan Kardec, le 4 et le 18 décembre 1912 | | 1913 | P. Roux-Delisle | | | | | |
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| La survivance de l'âme et son évolution après la mort: comptes rendus d'expériences | | 1920 | P. E. Cornillier | | | | | |
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| La tombe parle: le génie hugolien ressuscité, l'esprit "Symbole" animateur des tables de Jersey | | 1932 | Henri Azam | | | | | |
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| Le génie celtique et le monde invisible | | 1927 | Léon Denis | | | | | |
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| Le spiritisme, problème scientifique | | 1931 | Thérèse de. Tourniel, Michel Sage | | | | | |
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| Leaves from heaven: a message of God, a word from heaven | | 1921 | Harry Brayton Townsend | | | | | |
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| Les vivants et les morts | | 1922 | Henri Regnault | | | | | |
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| Letters from a living dead man | | 1914 | Elsa Barker | | | | | |
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| Letters from a living dead man | | 1914 | Elsa Barker | | | | | |
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| Letters from Roy | | 1917 | Leon Herbert Stevens | | | | | |
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| Letters from spirit people to earth friends demonstrating Christ's teachings through spirit return | | 1919 | Helen Weyant | | | | | |
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| The letters of a woman who was, by the woman | | 1917 | Helen Field Robertson | | | | | |
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| Life after death, problems of the future life and its nature | | 1918 | James H. (James Hervey) Hyslop | | | | | |
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| The life and mysteries of the celebrated Dr. "Q" | | 1921 | Conlin Alexander | | | | | |
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| Life here and hereafter: a sequel or second volume of "Spirit world and spirit life" | | 1927 | Fred Rafferty, Charlotte Elizabeth Dresser | | | | | |
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| Life in the circles | | 1920 | Anne W. Lane, Harriet Blaine Beale, Mrs Harriet Stanwood (Blaine) Beale | | | | | |
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| The life of James Riley, commonly called Farmer Riley, one of the world's greatest psychics: a complete and accurate account of the wonderful manifestations produced through his mediumship, at his home, and in different parts of the United States. And the author's twenty-two years' experience in the investigation of psychic phenomena | | 1911 | Abraham Vlerebome | | | | | |
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| Lifting the veil, or, Interior experiences and manifestations | | 1887 | Susan J. Finck, Andrew A. Finck | | | | | |
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| The light bearers | | 1918 | Alfred Howe Terry | | | | | |
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| Light on the Hidden Way | | 1886 | Katherine B. Caine | | | | | |
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| Livet efter døden i nyt lys: et indlæg og en dokumentation om de oversanselige fænomener | | 1925 | Ludvig Dahl | | | | | |
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| The living Jesus: the words of Jesus of Nazareth uttered through the medium Frederick A Wiggin, from February 11 to June 1, 1921 | | 1921 | Frederick Alonzo Wiggin | | | | | |
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| Living waters | | 1925 | Grace Atkinson Kimball, Mrs Grace Lucia (Atkinson) Kimball | | | | | |
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| Loaves and fishes: a study of the miracles, of the resurrection, and of the future life, in the light of modern psychic knowledge | | 1935 | Hereward Carrington, Frederick King Turgeon, Arthur Chew Gilligan | | | | | |
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| "Long distance, please," | | 1936 | J. H. | | | | | |
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| Lumen | | 1897 | Camille Flammarion | | | | | |
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| The making of a super-race | | 1926 | Alcinous Burton Jamison | | | | | |
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| Man's great adventure | | 1934 | Titus Bull | | | | | |
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| Man's life purpose | | 1915 | Rev. Joseph A. Milburn, William Charles Comstock | | | | | |
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| Man's spiritual possibilities, or, The triumph of the spirit over physical conditions. | | 1895 | Augusta W. Fletcher | | | | | |
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| Man's unconscious spirit; the psychoanalysis of spiritism | | 1921 | Wilfrid Lay | | | | | |
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| Man: whence and whither? | | 1922 | John Emery McLean, Alcinous Burton Jamison | | | | | |
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| "Margery" the medium | | 1925 | J. Malcolm (James Malcolm) Bird | | | | | |
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| Mediumismus | | 1925 | Fritz Grunewald | | | | | |
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| Mediums and the development of mediumship | "First edition." | 1946 | Robert Galen Chaney | | | | | |
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| Mediums unmasked : an exposé of modern spiritualism | | 1892 | Julia E. Garrett | | | | | |
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| The meeting of the spheres: or, Letters from Doctor Coulter | | 1919 | Charlotte G. Herbine | | | | | |
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| The menace of spiritualism | | 1920 | Elliott O'Donnell, Father Bernard Vaughan | | | | | |
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| The menace of spiritualism | | 1920 | Elliott O'Donnell, Father Bernard Vaughan, Elliot O | | | | | |
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| Message from William T. Stead; sketch and events of his life, 1849-1912; short history of the medium Mrs. Pennau-Cook; principles of the center; A vision; including constitution and by-laws of the W.T. Stead Memorial Center, Incorporated, 1913. | | 1917 | | | | | | |
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| The message, Lord Kitchener lives | | 1922 | Ala. Mana | | | | | |
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| The message of Anne Simon | | 1920 | Otto Torney Simon, Mrs. Anne Simon | | | | | |
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| A message to you | | 1930 | Charles F. Hoffman | | | | | |
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| Messages from higher spheres | | 1912 | Mrs Minnehaha Howard True | | | | | |
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| Messages on healing; | | 1936 | Jane Revere Burke, Edward Sandford Martin, William James | | | | | |
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| Modern spiritualism: A subject of prophecy and a sign of the times | | 1896 | Uriah Smith | | | | | |
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| A modern spiritualistic classic: scientific proofs of another life. A series of essays comprising unique lessons of daily life, written by eminent persons after passsing from mortal to spirit life | | 1913 | Rose Levere | | | | | |
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| Moderne medium forschung: kritische betrachtungen zu dr. von Schrenck-Notzing's "Materialisationsphaenomene" | | 1914 | W. v. (Walter von) Gulat-Wellenburg, Mathilde Spiess Ludendorff | | | | | |
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| More things in heaven and earth: adventures in quest of a soul | | 1925 | Robert Blatchford | | | | | |
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| My adventure into spiritualism | | 1935 | Ezra Lee Howard | | | | | |
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| My experiences while out of my body and my return after many days | | 1915 | Cora L. V. (Cora Linn Victoria) Richmond | | | | | |
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| My life as a search for the meaning of mediumship | | 1939 | Eileen Jeanette Lyttle Garrett | | | | | |
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| The natural order of spirit: a psychic study and experience | | 1915 | Lucien Chase Graves | | | | | |
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| The naturalisation of the supernatural | | 1908 | Frank Podmore | | | | | |
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| Neither dead nor sleeping | | 1920 | May Wright Sewall, Booth Tarkington | | | | | |
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| The new black magic and the truth about the ouija-board | | 1919 | J. Godfrey (John Godfrey) Raupert | | | | | |
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| A new conception of love | | 1934 | Sir Vincent Caillard | | | | | |
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| The new divinity | | 1929 | Herman Behr, Henry Ward Beecher | | | | | |
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| The new Nuctemeron (the twelve hours of Apollonius of Tyana) | | 1930 | Arthur Conan Doyle, Marjorie Livingston | | | | | |
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| A new or fundamental logic and critic | | 1884 | Arthur Young | | | | | |
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| The new revelation | | 1918 | Arthur Conan Doyle | | | | | |
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| The new science: lectures | | 1930 | Herman Behr, Henry Ward Beecher | | | | | |
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| A new scientific and philosophical treatise upon the origin, development, and destiny of man | | 1891 | Thomas P. Fletcher | | | | | |
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| The next beyond: Anonymous | | 1921 | | | | | | |
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| Normal and abnormal evolution | | 1921 | Allessandro Zymonidas | | | | | |
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| Nutids-undere: et nyt indlæg fra forfatteren av "Livet efter døden i nyt lys" | | 1927 | Ludvig Dahl | | | | | |
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| Observation d'un cas de médiumnité intellectuelle | | 1927 | Gustave Géley, Rocco Santoliquido | | | | | |
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| The occult powers of modern spiritualism, designed as a popular treatise | | 1925 | Alfred Rundquist | | | | | |
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| Okkultismus und spiritismus und ihre weltanschaulichen folgerungen | | 1926 | Richard Baerwald | | | | | |
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| Old and new psychology | | 1902 | W. J. (William Juvenal) Colville | | | | | |
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| On miracles and modern spiritualism : three essays | | 1881 | Alfred Russel Wallace | | | | | |
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| On the cosmic relations | | 1914 | Henry Holt | | | | | |
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| On the edge of the etheric: being an investigation of psychic phenomena, based on a series of sittings with Mr. John C. Sloan, the Glasgow trance and direct voice medium | | 1932 | James Arthur Findlay | | | | | |
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| On the soul : its nature and development | | 1881 | Peary Chand Mitra |  | | | | |
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| On the throne of sin: spiritism and the nature of man as related to demonism, witchcraft, and modern spiritualism | | 1927 | Charles Miles Snow | | | | | |
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| The one way | | 1921 | Jane Severe Burke, Jane Revere Burke, William James | | | | | |
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| The one way | | 1926 | George B. Wehner | | | | | |
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| One world--at a time | | 1927 | Bernard Hamilton | | | | | |
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| Open the door! | | 1935 | Claude Bragdon, Edith Ellis, (Spirit) Wilfred Brandon | | | | | |
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| The opening of the door | | 1932 | Anne. Christie, Mary Worth | | | | | |
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| Oracle | | 1921 | Eugenie Julier Macaulay Bragdon, Claude Fayette Bragdon | | | | | |
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| The other world and this : a compendium of spiritual laws. | | 1893 | Augusta W. Fletcher | | | | | |
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| The other world: or, Glimpses of the supernatural. Being facts, records, and traditions relating to dreams, omens, miraculous occurrences, apparitions, wraiths, warnings, second-sight, witchcraft, necromancy, etc | | 1875 | Frederick George Lee | | | | | |
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| Our eternity | | 1913 | Maurice Maeterlinck, Alexander Teixeira | | | | | |
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| Our Joe, or, Why we believe our brother lives! | | 1922 | (Spirit) Joseph Harvey Mundell, Charles Samuel Mundell | | | | | |
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| Our unseen guest | | 1920 | | | | | | |
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| Past and present with Mrs. Piper | | 1922 | Anne Manning Robbins | | | | | |
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| Pensée & volonté | | 1929 | Ernesto Bozzano | | | | | |
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| The people we call Indians | | 1954 | Loretto Douglas | | | | | |
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| Personal experiences in spiritualism : including the official account and record of the American Palladino séances | | 1913 | Hereward Carrington | | | | | |
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| Pesky problems for positive preachers | | 1921 | James McGregor Beatty | | | | | |
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| Pheneas speaks: direct spirit communications in the family circle | | 1927 | Arthur Conan Doyle | | | | | |
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| Pheneas speaks: direct spirit communications in the family circle | | 1927 | Arthur Conan Doyle | | | | | |
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| Photographic copies of written messages from the spirit world: more than one hundred written communications from those who dwell in spirit life, including messages from Henry Ward Beecher ... and many others : with commentaries concerning conditions which obtain in spirit life based upon facts gathered from these messages and from many other sources | | 1918 | William H. (William Hilton) Burr | | | | | |
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| Photographing the invisible: practical studies in spirit photography, spirit portraiture, and other rare but allied phenomena | | 1911 | Ph.D., F.A.S James Coates | | | | | |
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| The physical phenomena of spiritualism, fraudulent and genuine: being a brief account of the most important historical phenomena; a criticism of their evidential value, and a complete exposition of the methods employed in fraudulently reproducing the same | [3d ed.] | 1920 | Hereward Carrington | | | | | |
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| The physical phenomena of spiritualism, fraudulent and genuine: being a brief account of the most important historical phenomena, a criticism of their evidential value, and a complete exposition of the methods employed in fraudulently reproducing the same | | 1907 | Hereward Carrington | | | | | |
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| The prediction of the future: a new experimental theory | | 1936 | Pierre-Émile Cornillier, Leon Ernest Eeman | | | | | |
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| Preliminary report of the commission appointed by the University of Pennsylvania to investigate modern spiritualism, in accordance with the request of the late Henry Seybert | | 1920 | H. H. Furness, Henry Seybert | | | | | |
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| The priesthood of the laity | | 1927 | G. Vale (George Vale) Owen | | | | | |
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| The primer of pure spiritualism: a foundational text book for all spiritualists, units of the Band of pure spiritualism, and students of psychic research | | 1936 | Daisy Gibson Buettner, Mrs. (Gibson) Daisy Buettner | | | | | |
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| Problems of the spiritual | | 1907 | Arthur Chambers | | | | | |
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| Proofs of the spirit world (On ne meurt pas) | | 1920 | Agnes Kendrick Gray, Léon Chevreuil | | | | | |
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Public Domain Books