The Other God: Dualist Religions from Antiquity to the Cathar Heresy, by Yuri Stoyanov "In this revision of The Hidden Tradition in Europe: The Secret History of Medieval Christian Heresy (1994), Stoyanov amasses a compelling and comprehensive account of the transmissions of Gnostic-Manichean dualism which spawned the medieval Bogomil and Cathar movements." 490pp Paper