Philip Coppens

Killing Kennedy

The Stone Puzzle of Rosslyn Chapel

The Cryptogram of Rennes-le-Chateau

Land of the Gods

The The Ancient Alien Question, 10th Anniversary Edition

The Lost Civilization Enigma

Secret Societies & Spirituality: Templars, Freemasons & The Path

2012: Mayan Prophecy (Unabridged)

The Ancient Alien Question: From UFOs to Extraterrestrial Visitations (Unabridged)

Ancient Alien Conspiracy: UFOs and the Dawn of Civilization

Ancient Alien Question, 10th Anniversary Edition : An Inquiry Into the Existence, Evidence, and Influence of Ancient Visitors

Alien Crash at Roswell: The UFO Truth Lost in Time