*_Vejen til klit_ (2005)
* _The Life and Times of Frank Herbert_ (2007)
* _Nøglen til klit_ (2008)
* _The Forbidden Worlds of Frank Herbert_ (2010)
* _The Jesus Virus_ (2012)
* _The Martian Warlord_ (2014)
* _Kætteren fra Dune_ (2016)
* _The Blademaster of Dune_ (2018)
* _The War Master of Dune_ (2020)
Faglitteratur:
* _Crossover:A Look at the Crossover Series_ (1995)
* _The New York City Handbook_ (1996)
* _The Star Wars Quiz Book_ (1997)
* _Det bedste ved Trek_ (1998)
* _The Classic Trek Quiz Book_ (1999)
* _The Next Generation Trek Quiz Book_ (2000)
* _The Deep Space Nine Trek Quiz Book_ (2001)
* _The Voyager Trek Quiz Book_ (2002)
* _The Enterprise Trek Quiz Book_ (2003)
* _Sci-Fi Chronicles_ (2004)
* _The Essential Dune Reader's Guide_ (2008)
* _Frank Herbert_ (2013)
* _The Dune Encyclopedia_ (2020)