* The Ottoman Cage
* The Sword and the Scimitar
* The Shadow of the Khan
* The Last Duel of the Templars
* The Secret History of the Silk Road
* The First Crusade
* The Second Crusade
* The Third Crusade
* The Fourth Crusade
* The Children's Crusade
Nonfiction:
* Adventures of a Renaissance Man: My Life in Art, History, and Academia
* The History of the Crusades: A Comprehensive Guide to the Crusades and the Holy Land
* The Art of the Crusades: A Survey of the Art and Architecture of the Crusades
* The Archaeology of the Crusades: A Survey of the Archaeological Evidence of the Crusades
* The Crusades: A History