* _Unbecoming_
* _Dead Silence_
* _Warning Light_
* _Dust_
* _The Stone Gate_
* _House of Rot_
* _Primal_
* _Patient Zero_
* _The Reaping_
* _The Final Descent_
* _In Silence_
Nonfiction:
* _The Ultimate Zombie Book: A Guide to the Living Dead_
* _Zombie CSU: The Forensics of the Living Dead_
* _The Science of Star Wars_
* _The Science of Star Trek: The Physics Behind the Fiction_
* _Supervolcano: Eruption of Mount Toba, Lessons for Today's Supervolcanoes_
* _The Big Bang: Origins of the Universe_
* _The Dark Matter Mystery: The Search for the Invisible Mass of the Universe_