Ian Caldwell

Become a Fan

Ian Caldwell is the coauthor of The Rule of Four, which spent forty-nine weeks on the New York Times bestseller list, sold nearly 2 million copies in North America, and was translated into thirty-five languages. He lives in Virginia with his wife and children.

Arika Van Brunt

Books by this Author

The Fifth Gospel
The Rule of Four


Mysteries of the Vatican Revealed

Ian Caldwell, author of 'The Fifth Gospel', takes us inside one of the most mysterious places in the world to reveal some little known facts about The Vatican.