* "Land of Smoke" (1989)
* "Den sidste frie mand" (1990)
* "Stencirklen" (1991)
* "Shamanen" (1992)
* "The Viking Relic" (1993)
* "The Ghost Dancers" (1994)
* "The Aztec Curse" (1995)
* "The Maya Prophecy" (1996)
* "Inkaskæbnen" (1997)
* "Den aztekiske hemmelighed" (1998)
* "The Maya Codex" (1999)
* "Inkaprofetien" (2000)
* "The Aztec Enigma" (2001)
* "The Maya Revelation" (2002)
* "Inkaapokalypsen" (2003)
* "The Aztec Legacy" (2004)
* "The Maya Resurgence" (2005)
* "The Inca Redemption" (2006)
* "The Aztec Empire" (2007)
* "The Maya Calendar" (2008)
* "Inkasolen" (2009)
* "The Aztec Warrior" (2010)
* "The Maya Priest" (2011)
* "Inka-kongen" (2012)
* "Den aztekiske gud" (2013)
* "The Maya Hero" (2014)
* "Inkalegenden" (2015)
* "The Aztec Sacrifice" (2016)
* "The Maya Ritual" (2017)
* "Inkafestivalen" (2018)
* "The Aztec Eclipse" (2019)
* "The Maya Solstice" (2020)
* "The Inca Equinox" (2021)
Faglitteratur:
* "The Mystery of the Maya" (1995)
* "Sandheden om inkaerne" (1997)
* "The Aztec Codex" (1999)
* "The Maya Calendar" (2001)
* "Inkasolen" (2003)
* "The Aztec Warrior" (2005)
* "The Maya Priest" (2007)
* "Inka-kongen" (2009)
* "Den aztekiske gud" (2011)
* "The Maya Hero" (2013)
* "Inkalegenden" (2015)