| Enigma of Out of Body Travel by Suzy Smith | |
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The Secret in Building 26: The Untold Story of How America Broke the Final U-boat Enigma Code by Jim Debrosse and Colin Burke |
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The Enigma of the Gift by Maurice Godelier and Nora Scott |
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Sheela-na-gigs: Unravelling an Enigma by B. Freitag |
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The Tom Hanks Enigma: The Biography of the World's Most Intriguing Movie Star by David Gardner |
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Tertium Organum: Or, The Third Canon of Thought and a Key to the Enigmas of the World by P. D. Ouspensky and Claude Bragdon |
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Los angeles (Enigmas de las ciencias ocultas series) by Joan Wilhelm |
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Emerald Enigma: The Prequel by C.j. Westwick |
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The Spirit of Dr. Bindelof: The Enigma of Seance Phenomena by Rosemarie Pilkington |
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The Endless Enigma: Dal? and the Magicians of Multiple Meaning by Dawn Ades, Stephan Andreae, Elisabeth Bronfen, and Claudia Dichter |
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The Domino Enigma (Nexus) by Cyrian Amberlake |
| Frederick the Great: The Magnificent Enigma by Robert B. Asprey |