- "The Uninvited Man"
- "The Last Revelation" (2017) is about the biblical apocalypse
- "The God Conspiracy Book 1: Angels Fall" (2008)
- "The God Conspiracy Book 2: Mortal Games" (2009)
- "The God Conspiracy Book 3: Rise of a Dark God" (2011) (Also known as _Godkiller_)
- "Shadow Patriots: Rise" (2012)
- "Shadow Patriots: Darkness Falls" (2013)
- "Shadow Patriots: Final Battle" (2013)
- "In Darkness, Shadows Fall" (2017)
Non-fiction:
- _Dark Mission: The Secret History of NASA_ (2007) with Robert M. Wood