* _Believer_ (1998)
* _Gemini_ (1999)
* _Blackout_ (2000)
* _The Last Templar_ (2005)
* _Arrowhead_ (2007)
* _The Gray Pilgrim_ (2010)
* _The Last Hawk_ (2013)
* _The Sacred Sword_ (2016)
Nonfiction:
* _The Complete Guide to the SAS_ (2010)
* _The Secret History of the Knights Templar_ (2012)