- The City:A Novel (2004)
- City of Shadows:A Novel (2005)
- City of Light:A Novel (2006)
- Det tredje rikes hemmelige historie (2008)
- The Dogs of War:A Novel (2009)
- The Last Battle:A Novel (2010)
Faglitteratur:
- Den nazistiske undergrunnen i Amerika (1993)
- Secret Societies and the Power Elite (1994)
- The Illuminati:A History (1995)
- The New World Order:A History (1996)
- The End of the World:A History (1997)
- The Anti-Christ:A History (1998)
- The 13th Step:A History of Secret Societies (1999)
- The Freemasons:A History (2000)
- The Knights Templar:A History (2001)
- The Rosicrucians:A History (2002)
- The Holy Grail:A History (2003)