* "The Book of Secrets" (2005)
* "Stenhaven" (2007)
* "The House at Whitethorn Lane" (2009)
* "Pigen der gik gennem tiden" (2011)
* "De sidste dage i Skt. Petersborg" (2013)
* "The Lady of Shalott" (2015)
* "The Whispering Shadow" (2017)
* "The Maze of Mirrors" (2019)
* "The Midnight Assassin" (2021)
Faglitteratur:
* "The Illustrated Book of Myths" (2010)
* "The Illustrated Book of Fairy Tales" (2012)
* "The Illustrated Book of Legends" (2014)
* "The Illustrated Book of Mysteries" (2016)