Philip Coppens
Philip Coppens has written at least 6 books. Their most popular book is The Ancient Alien Question: A New Inquiry Into the Existence, Evidence, and Influence of Ancient Visitors with 2 saves with an average rating of -⭐.
 The Ancient Alien Question: A New Inquiry Into the Existence, Evidence, and Influence of Ancient Visitors
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 Lost Civilizations & Secrets of the Past Lost Civilizations & Secrets of the Past
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 The Lost Civilization Enigma The Lost Civilization Enigma: A New Inquiry Into the Existence of Ancient Cities, Cultures, and Peoples Who Pre-Date Recorded History
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 The Lost Civilization Enigma: A New Inquiry into the Existence of Ancient Cities, Cultures, and Peoples Who Pre-Date Recorded History
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 Lost Civilization Enigma: A New Inquiry Into the Existence of Ancient Cities, Cultures, and Peoples Who Pre-Date Recorded History
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 Ancient Alien Question, 10th Anniversary Edition
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