* The Wolf's Tooth (2009)
* The Raven's Shadow (2011)
* The Serpent's Embrace (2013)
* The Dragon's Fire (2015)
* The Unicorn's Horn (2017)
* The Griffin's Claw (2019)
* The Phoenix's Feather (2021)
Non-Fiction
* Vampires: A History (2008)
* Werewolves: A History (2010)
* Zombies: A History (2012)
* Ghosts: A History (2014)
* Witches: A History (2016)
* Aliens: A History (2018)
* Dragons: A History (2020)