- Young People Ask: Answers That Work (2011)
- The Great Escape: Adventures in the Hunt for the Missing Gnostics (2009)
- The Heretic: A Tale of Rebellion and Redemption (2008)
- Heroes and Heretics: The Genius and Fall of the Templar Knights (2007)
- Saving the Titanic (2005)
- At the End of the World: The Visionary Adventures of Captain James Cook (2003)
- The King's Assassin: The Life and Death of Thomas De Maulfrougier (2002)
- Shadow Men: Inside the Covert Operations of the CIA and MI6 (2000)
- Hitler's Monsters: A Supernatural History of the Third Reich (1999)
Magazine Articles:
- "The Mysterious Death of George Mallory" (2016)
- "The Search for the Lost Ark" (2015)
- "The Enigma of Easter Island" (2014)
- "The Holy Grail: Fact or Fiction?" (2013)
- "The Secret History of the Illuminati" (2012)
Television Documentaries:
- "Mysteries of the Ancient World" (2017)
- "Nazi Superstition" (2016)
- "The Roswell Files" (2015)
- "In Search of the Lost Ark" (2014)
- "The Real Da Vinci Code" (2013)