- Unge spørger:svar der virker (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)
- Ved verdens ende:Kaptajn James Cooks visionære eventyr (2003)
- The King's Assassin:The Life and Death of Thomas De Maulfrougier (2002)
- Shadow Men:Inside the Covert Operations of CIA og MI6 (2000)
- Hitler's Monsters:A Supernatural History of the Third Reich (1999)
Magasinartikler:
- "The Mysterious Death of George Mallory" (2016)
- "Søgen efter den forsvundne ark" (2015)
- "The Enigma of Easter Island" (2014)
- "Den hellige gral:fakta eller fiktion?" (2013)
- "The Secret History of the Illuminati" (2012)
Tv-dokumentarer:
- "Mysteries of the Ancient World" (2017)
- "Nazi Superstition" (2016)
- "The Roswell Files" (2015)
- "In Search of the Lost Ark" (2014)
- "Den rigtige Da Vinci-kode" (2013)