* _Atlantis:The Birth of Legends_ (1998)
* _The Etruscan Chronicles:The Secrets of the Mysterious Civilization of Ancient Italy_ (2000)
* _The Secret History of the Templars:The Hidden Archive and the Legacy of the Middle Ages_ (2002)
* _Den store gudinnen:hemmeligheten bak de gamle mytene_ (2004)
* _De hellige symbolene:hemmelighetene til eldgamle symboler og deres innflytelse på kulturelle tradisjoner_ (2006)
* _The Lost Cities:Adventures with the Great Explorers of the Past_ (2008)
* _The Ancient Mysteries:Unsolved Riddles of the Past_ (2010)
* _Gullalderen:Historien og arven fra gullalderen til antikkens Hellas og Roma_ (2012)
* _The Dark Ages:The History and Legacy of the Dark Ages of European History_ (2014)
* _Renessansen:Historien og arven fra renessansetiden i Europa_ (2016)
Fjernsynsdokumentarer:
* _Atlantis:The Lost Continent_ (1998)
* _Den etruskiske gåten_ (2001)
* _The Knights Templar:Secrets and Mysteries_ (2003)
* _The Great Goddess:In Search of the Divine Feminine_ (2005)
* _The Sacred Symbols:Unveiling the Mysteries of Ancient Symbols_ (2007)
* _The Lost Cities:Adventures with the Great Explorers of the Past_ (2009)
* _The Ancient Mysteries:Unsolved Riddles of the Past_ (2011)
* _Gullalderen:Historien og arven fra gullalderen til antikkens Hellas og Roma_ (2013)
* _The Dark Ages:The History and Legacy of the Dark Ages of European History_ (2015)
* _Renessansen:Historien og arven fra renessansetiden i Europa_ (2017)