* Fallen (2007)
* Ghost (2008)
* The Watch (2009)
* The Dead (2010)
* The Hidden (2011)
* The Rise (2012)
* The Fall (2013)
* The Restoration (2014)
* The Ascension (2015)
* The Reckoning (2016)
* The Aftermath (2017)
Short Stories
* "The Thirteenth Hour" (2007)
* "The Last Days of Summer" (2007)
* "The Long Road Home" (2008)
* "The Road to Redemption" (2009)
* "The Path to Destiny" (2010)
* "The Journey to the End" (2011)
Non-Fiction
* The Art of Writing: A Guide for Fiction Writers (2011)
* The Business of Writing: A Guide for Authors (2013)
* The Publishing Process: A Guide for Authors (2015)
* The Writer's Life: A Guide for Authors (2017)
Awards
* International Thriller of the Year Award
* Deutscher Phantastik Preis
* Premio Italia
* Premio Urania
* Prix Bob Morane
* Premio Gigamesh