This is the first non-fiction companion to Dan Brown's mega-selling novel The Da Vinci Code. Its simple A-Z format tells you everything you need to know about the facts behind the fiction, and reveals the latest theories about the secret society called the Priory of Sion and the remarkable legend of the Holy Grail. Featuring background information on all the key characters, illustrations of the symbols encoded in the paintings, further reading resources and countless 'extras' (such as revealing the in-jokes hidden in the characters' names), this is an invaluable resource for the many millions of fans of the book.