Despite being a work of fiction, the bestselling novel The Da Vinci Code has a plot based on a number of concepts and ideas that the author claims to be true. This book explores the locations, historical facts and theories, and the sources of inspiration behind the novel in order to reveal the true key to the Da Vinci code. Stewart Ferris first visited Rennes-le-Château in 1983 and has recently written and presented a documentary in which he investigates theories about the source of the sudden wealth of its nineteenth century village priest, Bérenger Saunière. It is some of these theories upon which Dan Brown based the theme of The Da Vinci Code. He is also the author of more than twenty other books, published in seven languages. For photos to accompany this book visit .