• "'Astonishing, gruesome, shocking, and sensational...An impressively argued book'"

    Washington Times
  • "One of the most fascinating books I have read since The Holy Blood and the Holy Grail"

    Colin Wilson
  • "A cracking art-detection story, as well as a central inspiration for The Da Vinci Code... A highly entertaining book"

    The Rough Guide to The Da Vinci Code
  • "One of the key books in The Da Vinci Code's bibliography and the original source of a number of the novel's theories about Leonardo, the Templars, and the Priory of Sion"

    Dan Burstein, Secrets of the Code