• Underworld: The Mysterious Origins of Civilization
• The Master Game: Unmasking the Secret Rulers of the World
• America Before
• Entangled
• War God: Nights of the Witch
• War God: Return of the Plumed Serpent
• The Message of the Sphinx AKA Keeper of Genesis
• Fingerprints of the Gods
• The Sign and the Seal
• The Mars Mystery: The Secret Connection Between Earth and the Red Planet
• Magicians of the Gods: The Forgotten Wisdom of Earth's Lost Civilization
• War God
• Underworld
• The Mars Mystery
• Magicians of the Gods
• The Master Game