* The Black God's War (2009)
* The Blood Red City (2009)
* The Iron Hand of Mars (2011)
* The City of a Thousand Suns (2013)
* The Sky Between the Worlds (2015)
* The Sound of Thunder (2017)
* The Great War (2019)
* The Last War (2021)
Non-Fiction:
* Dracula Revealed: The Secrets Behind the Vampire Myth (2011)
* Great Battles of the Civil War (2012)
* The 100 Greatest Conspiracies of All Time (2013)
* The Secret Life of Jesus: The Gnostic Gospels and the True Story of the Master (2015)
* The Book of the Dead: Unlocking the Secrets of the Afterlife (2017)
* The Secret History of the World: From the Ancient Mysteries to the Modern Conspiracy (2019)
* The Alien Agenda: The Truth Behind the UFO Phenomenon (2021)
Short Stories:
* "The Last Call" (2009)
* "The Man Who Saw the Face of God" (2011)
* "The Dead Speak" (2013)
* "The Time Machine" (2015)
* "The War of the Worlds" (2017)
* "The Call of Cthulhu" (2019)
* "The Shadow over Innsmouth" (2021)