* The Shadow Queen (2003)
* Krystallrosen (2004)
* The Midnight Mirror (2005)
* Den hemmelige hagen (2006)
* The Golden Key (2007)
* The Silver Wand (2008)
* The Iron Glove (2009)
* Rubyringen (2010)
* The Emerald Crown (2011)
* The Diamond Scepter (2012)
sakprosa
* The History of the British Monarchy (2002)
* The History of the Tower of London (2004)
* The History of the British Empire (2006)
* Historien om første verdenskrig (2008)
* Historien om andre verdenskrig (2010)