* Skjønnlitteratur
* _En neve med diamanter_ (1985)
* _Den siste dansen_ (1987)
* _Night of the Stormrider_ (1990)
* _Wild Child_ (1993)
* _Red Angel_ (1996)
* _Den syvende trompet_ (1999)
* _Hemmelighetenes konge_ (2002)
* _Slangebrorskapet_ (2005)
* _The Genesis Device_ (2008)
* _Lazarus-porten_ (2011)
* _Exalted_ (2014)
* _Shadowmancer_ (2017)
* Faglitteratur
* _The Illustrated Encyclopedia of the American West_ (1989)
* _The American Frontier_ (1992)
* _The Dictionary of American History_ (1995)
* _The Encyclopedia of the American Revolution_ (1997)
* _The Encyclopedia of American Crime and Punishment_ (2000)
* _The Encyclopedia of the New Millennium_ (2003)
* _The Encyclopedia of the Old West_ (2006)
* _The Encyclopedia of American Law_ (2009)
* _The Encyclopedia of American History:A History of the United States fra 1492 til i dag_ (2012)
* Barnebøker
* _The Brave Cowboy_ (1990)
* _The Runaway Train_ (1992)
* _Den tapte katten_ (1994)
* _Den magiske hesten_ (1996)
* _Den fantastiske hunden_ (1998)
* _Den vennlige dragen_ (2000)
* _The Silly Monkey_ (2002)
* _Den smarte kaninen_ (2004)
* _The Busy Bee_ (2006)
* _Den glade pingvinen_ (2008)