| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| 5,000 new answers to questions | | 1932 | Frederic J. (Frederic Jennings) Haskin | |  | | | |    
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| Answering children's questions | | 1950 | C. W. (Clarence William) Hunnicutt | | | |  | |
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| Answers to everyday questions | | 1930 | S. Parkes (Samuel Parkes) Cadman | | | | | |
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| Believe it or not! | | 1934 | Robert L. (Robert LeRoy) Ripley | |  | | | |
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| Believe it or not!: A modern book of wonders, miracles, freaks, monstrosities and almost-impossibilities | | 1929 | Robert L. (Robert LeRoy) Ripley | | | | | |
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| The first world flight | | 1925 | Lowell Thomas, Lowell H. Smith | | | | | |
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| A history of curios in the private museum of Charles Q. Eldredge, Old Mystic, Conn., containing items of tragedy, romance, war, murder, comedy, love, rum and prohibition gathered during the past seventy years | | 1926 | Charles Q. Eldredge | | | | | |
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| How, why, when, where | | 1934 | Geo. F. Howard, Belinda Hollyer, Jennifer Justice | | | | | |
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| The Loch Ness monster and others | | 1934 | Rupert Thomas Gould | | | | | |
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| Memoirs of the Lady Hester Stanhope: as related by herself in conversations with her physician; comprising her opinions and anecdotes of some of the most remarkable persons of her time | | 1845 | Lady Hester Stanhope, Charles Lewis Meryon | | | | | |
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| Nuggets of knowledge | | 1928 | George W. Stimpson | | | | | |
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| The queer, the quaint, the quizzical: a cabinet for the curious | | 1882 | Francis Henry Stauffer | | | | | |
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| The queer, the quaint, the quizzical: a cabinet for the curious | | 1968 | Francis Henry Stauffer | | | | | |
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| The quest for Corvo: an experiment in biography | | 1934 | A. J. A. (Alphonse James Albert) Symons | | | | | |
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| Raiders of the absolute | | 1937 | Benjamin De Casseres | | | | | |
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| Recollections of the late William Beckford, of Fonthill, Wilts: and Lansdown, Bath | | 1893 | Henry Venn Lansdown, XXX Lansdown, Charlotte Lansdown |  | | | | |
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| The terrific register | | 1825 | | | | | | |
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| Things worth knowing | | 1932 | George W. Stimpson | | | | | |
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| Uncommon knowledge | | 1936 | George W. Stimpson | | | | | |
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Public Domain Books