* Den sorte rose (2004)
* Den skjulte by (2006)
* Inkaernes hemmelighed (2008)
* Tempelherrernes skat (2010)
* The Lost Codex (2012)
* The Maya Prophecy (2014)
* Den sidste hemmelighed (2016)
* The Book of Shadows (2018)
* The Devil's Triangle (2020)
Faglitteratur:
* The History of the Inka Empire (2002)
* The Mysteries of Machu Picchu (2005)
* Pyramidernes hemmeligheder (2007)
* The Knights Templar:A History (2009)
* The Voynich Manuscript:A Mystery Unraveled (2011)
* The Dead Sea Scrolls:A New Translation (2013)
* Judasevangeliet:En ny fortolkning (2015)
* The Turin Shroud:A Scientific Investigation (2017)
* The Nazca Lines:A New Perspective (2019)