* The Edge of Reason (2004)
* Det røde rommet (2005)
* Shadows in the Moonlight (2006)
* The Lost City (2007)
* The City of Secrets (2008)
* The Island of Shadows (2009)
* Den siste sjansen (2010)
* Fryktens hus (2011)
* The Eye of the Storm (2012)
* Den mørkeste dagen (2013)
Faglitteratur:
* The Secrets of Shakespeare's Sonnets (2010)
* The Shakespeare Conspiracy (2011)
* The Shakespeare Code (2012)
* The Shakespeare Curse (2013)
* The Shakespeare Enigma (2014)
* The Shakespeare Mystery (2015)
* The Shakespeare Solution (2016)
* The Shakespeare Legacy (2017)
* The Shakespeare Secret (2018)
* The Shakespeare Canon (2019)
* The Shakespeare Chronology (2020)
* The Shakespeare Biography (2021)