Philip Coppens

The Lost Civilization Enigma: A New Inquiry into the Existence of Ancient Cities, Cultures, and Peoples Who Pre-Date Recorded History - Philip Coppens

Unknown, Philip Coppens

The Ancient Alien Question A New Inquiry Into the Existence, Evidence, and Influence of Ancient Visitors - Philip Coppens

Philip Coppens

Read by Kevin Foley

The Ancient Alien Question, 10th Anniversary Edition An Inquiry into the Existence, Evidence, and Influence of Ancient Visitors - Philip Coppens, Erich Von Dniken - foreword, Kathleen McGowan - preface

Unknown, Philip Coppens, Erich Von Dniken - foreword, Kathleen McGowan - preface