* The Secret Life of Leonardo de Vinci
* The Book of Swords
* The Tower
* The Stone
* The Sword of Moses
Nonfiction:
* History of the World in 6 Glasses
* The First Crusade: The Call from the East
* The Crusades: A Reader
* The Middle Ages: An Illustrated History
* The Renaissance: An Illustrated History
* The Reformation: An Illustrated History
* The Enlightenment: An Illustrated History