New Pyramid Age, The – Worldwide Discoveries of New Pyramids Challenge Our Thinking Coppens Philip Heftet / 2007 / Engelsk
Lost Civiliation Enigma A New Inquiry into the Existence of Ancient Cities, Cultures, and Peoples Who Pre-Date Recorded History Coppens Philip Heftet / 2012 / Engelsk
Ancient Alien Question, 10th Anniversary Edition An Inquiry Into the Existence, Evidence, and Influence of Ancient Visitors Coppens Philip Heftet / 2021 / Engelsk
Secret History of the Reptilians The Pervasive Presence of the Serpent in Human History, Religion and Alien Mythos Roberts Scott Alan Heftet / 2013 / Engelsk
