* The Blackfriar's Chronicle (2008)
* In Vino Veritas (2009)
* The Temptation of Eva (2010)
* The Sins of Marie Antoinette (2011)
* The Ladies of Paradise (2013)
* Lady of Shadows (2015)
* The Secret Life of Marilyn Monroe (2017)
* The House on the Hill (2018)
* The Art of Kissing (2019)
sakprosa
* Den katolske kirkes oppgang og fall (2006)
* Michelangelos hemmelige liv (2007)
* Da Vinci-kodens hemmelige historie (2010)
* The Lost Art of Love (2012)
* Casanovas hemmelige liv (2014)
* Jesuittenes hemmelige historie (2016)
* Adolf Hitlers hemmelige liv (2018)
* Vatikanets hemmelige historie (2019)
Barnebøker
* The Adventures of Captain Underpants (1997)
* The Adventures of Captain Underpants and the Attack of the Talking Toilets (1999)
* The Adventures of Captain Underpants og invasjonen av de utrolig frekke kafeteriadamene fra verdensrommet (2000)
* The Adventures of Captain Underpants and the absurd Plight of the Purple Potty People (2002)
* The Adventures of Captain Underpants and the Wrath of the Wicked Wedgie Woman (2003)
* The Adventures of Captain Underpants and the Big, Bad Battle of the Bionic Booger Boys (2004)
* The Adventures of Captain Underpants and the Terrifying Return of Tippy Tinkletrousers (2005)
* The Adventures of Captain Underpants and the Perilous Plot of Professor Poopypants (2006)
* The Adventures of Captain Underpants and the Ferocious Battle of the Boxer Boys (2007)
* The Adventures of Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers (2008)
* The Adventures of Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000 (2009)
* The Adventures of Captain Underpants and the Peculiary Problem of the Preposterous Panty Pirates (2010)
* The Adventures of Captain Underpants and the Splendid Saga of the Stinky Sock Stunners (2011)
* The Adventures of Captain Underpants and the Ridiculous Ruckus of the Robot Rumpus (2012)
* The Adventures of Captain Underpants and the Sensational Saga of Sir Stinky Sock (2013)
* The Adventures of Captain Underpants and the Stupendous Showdown of the Spooky Showdown (2014)
* The Adventures of Captain Underpants og den ekstraordinære spenningen til Extreme Emporium (2015)
* The Adventures of Captain Underpants and the Terrifying Tale of the Toxic Terror Toad (2016)
* The Adventures of Captain Underpants and the Explosively Escape Escape from the Exploding Elementary School (2017)
* The Adventures of Captain Underpants and the Lattericulous Raid of the Robo-Robbers (2018)
* The Adventures of Captain Underpants and the Preposterous Peril of the Puny Poopers (2019)
* The Adventures of Captain Underpants and the Big, Bad Battle of the Bionic Booger Boys (Collector's Edition) (2020)