Philip Coppens

The Cryptogram of Rennes-le-Chateau

The Lost Civilization Enigma

De Paus van Satan

Land of the Gods

Killing Kennedy

The Stone Puzzle of Rosslyn Chapel

Secret Societies & Spirituality: Templars, Freemasons & The Path

2012: Mayan Prophecy (Unabridged)

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

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

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

Alien Crash at Roswell: The UFO Truth Lost in Time