An essential notion in the #1 New York Times bestseller The Da Vinci Code is the existence of an age-old French society, the Priory of Sion, whose task it is to protect Christ's sacred bloodline. In The Sion Revelation, Picknett and Prince reveal the story of the Priory, taking readers on a highly significant, disturbing, and even alarming ride through history into an intriguing world where a great many uncomfortable facts...