* _Ravenhill's Legacy_ (2005)
* _An Unwelcome Awakening_ (2008)
* _The Ghost of Monte Carlo_ (2009)
* _The Silent City_ (2011)
* _The Iron Monastery_ (2013)
* _The Midnight Room_ (2015)
* _The Eternal Hourglass_ (2017)
* _The Last Hourglass_ (2019)
* _The Darkest Hourglass_ (2021)
Non-fiction:
* _The Real Story of Monte Carlo_ (2010)
* _The Secrets of the Ravens_ (2012)
* _The Mysteries of the Iron Monastery_ (2014)
* _The Origins of the Midnight Room_ (2016)
* _The Science of the Eternal Hourglass_ (2018)
* _The History of the Last Hourglass_ (2020)