| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| Amerika und urchristentum | | 1924 | Carl Maria Kaufmann |  |  | |  | |
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| The Ayar-Incas | | 1930 | Miles Poindexter | | | | | |
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| Die Fahrt ins Land ohne Tod: Roman | | 1937 | Alfred Döblin |  | | | | |
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| El reino de los Incas del Perú | | 1918 | James Cook Bardin, Garcilaso de la Vega | | |  | | |    
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| Fall of the Inca empire and the Spanish rule in Peru; 1530-1780 | | 1932 | Philip Ainsworth Means | | | | | |
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| Flight into America's past: Inca peaks and Maya jungles | | 1932 | Marie Oge. Beale | | | | | |
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| Francisco Pizarro: der Sturz des Inkareichs | | 1925 | H. G. Bonte, Garcilaso de la Vega, José de Acosta | | | | | |
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| History of the Incas | | 1907 | Sir Clements R. (Clements Robert) Markham, Pedro Sarmiento de Gamboa, active1610 Baltasar de Ocampo | | | | | |
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| Jungle paths and Inca ruins | | 1927 | William Montgomery McGovern | | | | | |
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| La musique des Incas et ses survivances | | 1926 | Raoul d'. Harcourt, Marguerite (Marguerite Béclard) d' Harcourt |  | | | | |
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| Les institutions et le droit de l'empire des Incas | | 1928 | Paul. Minnaert | | | | | |
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| The love of the Incas | | 1927 | Cora Urquhart Potter | | | | | |
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| The love on the Incas | | 1927 | Cora Urquhart Potter | | | | | |
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| Machu Picchu, a citadel of the Incas: report of the explorations and excavations made in 1911, 1912 and 1915 under the auspices of Yale University and the National Geographic Society | | 1930 | Hiram Bingham | | | | | |
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| Old civilizations of the New world | | 1929 | A. Hyatt (Alpheus Hyatt) Verrill | | | | | |
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| Origin of the Indian civilizations in South America. | | 1931 | Carl Gustaf Santesson, Henry Wassén, Erland Nordenskiöld |  | | | | |
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| The royal commentaries of Peru, in two parts: The first part. Treating of the original of their Incas or kings: of their idolatry: of their laws and government both in peace and war: of the reigns and conquests of the Incas ... The second part. Describing the manner by which that new world was conquered by the Spaniards. Also the civil wars between the Piçarrists and the Almagrians ... and other particulars contained in that history. Illustrated with sculptures | | 1688 | Sir Paul Rycaut, Garcilaso de la Vega | | | | | |
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| Yucay, a romance of early Peru | | 1941 | Dorothea Knox. Martin | | | | | |
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Public Domain Books