The Cathars: The Most Successful Heresy of the Middle Ages

The Lost Teachings of the Cathars: Their Beliefs and Practices

The Great Heresies

Crusade Against the Grail: The Struggle between the Cathars, the Templars, and the Church of Rome

Rennes le Château

The Nag Hammadi Scriptures: The Revised and Updated Translation of Sacred Gnostic Texts Complete in One Volume

The Secret History of the Gnostics: Their Scriptures, Beliefs and Traditions

The Gnostic Gospels (Modern Library 100 Best Nonfiction Books)

Massacre At Montsegur: A History Of The Albigensian Crusade

A History of Egypt from the Earliest Times to the Persian Conquest