* The Devil in the Cupboard (2003)
* The Ghost Box (2006)
* Darkmouth (2007)
* The Heretic (2009)
* Invisible (2011)
* The Shadow House (2013)
* The Necromancer's Apprentice (2015)
* The Serpent's Call (2017)
* The Demon's Game (2019)
* The Bone Master (2021)
Non-Fiction:
* The Book of Shadows (2004)
* The Grimoire of the Necromancer (2008)
* The Book of Spells (2010)
* The Book of Potions (2012)
* The Book of Amulets and Talismans (2014)
* The Book of Divination (2016)
* The Book of Curses and Blessings (2018)
* The Book of Ghosts (2020)