- "The Traveler" (1980)
- "The Dragons of Astivar" (1985)
- "The Blood of Amber" (1986)
- "The Winds of Fate" (1987)
- "The Shores of Tomorrow" (1988)
- "Drømmenes by" (1989)
- "The Master of Chaos" (1990)
- "The Warrior's Quest" (1991)
- "The Fate of the Dragon Lord" (1992)
- "The Dawn of Twilight" (1993)
- "The War of Dragons" (1994)
- "The Fall of Atlantis" (1995)
- "The Rise of Merlin" (1996)
- "The Lost City of Gold" (1997)
- "The Island of Shadows" (1998)
- "The Return of the Phoenix" (1999)
- "The Secret of the Sfinx" (2000)
- "The Legend of King Arthur" (2001)
- "Faraos forbannelse" (2002)
- "The Last Templar" (2003)
- "The Quest for the Holy Grail" (2004)
- "The Crystal Skull" (2005)
- "Slangens tann" (2006)
- "The Gates of Eternity" (2007)
- "Dommedagsnøkkelen" (2008)
- "Den siste profetien" (2009)
- "The End of Days" (2010)
- "The Final Battle" (2011)
Faktalitteratur:
- "The Cambridge Companion to Science Fiction" (2003)
- "The Cambridge Companion to Horror Fiction" (2005)
- "The Cambridge Companion to American Gothic Literature" (2008)
- "The Cambridge Companion to Fantasy Literature" (2012)
- "The Oxford Handbook of Science Fiction" (2014)
- "The Oxford Handbook of Fantasy Literature" (2015)