Criticism of The Da Vinci Code "Smithy Code Jackie Fisher who are you Dreadnought", referring to the British admiral whom Judge Smith admires. As with the book, this secret message made use of Fibonacci numbers for its encoding. Dan Brown has been sued twice in The United States by author Jack Dunn who claims Dan Brown copied his book The Vatican Boys (1997) to create The Da Vinci Code, Angels & Demons and Brown's now famous character Robert Langdon. Jack Dunn calls Dan Brown's actions, "The Largest Literary and Movie Crime in History." At a conference on April 28, 2006 Archbishop Angelo Amato, the secretary of
The Da Vinci Code of Michael Baigent, Richard Leigh and Henry Lincoln, who authored the book "Holy Blood, Holy Grail", in the program "The Real Da Vinci Code", shown on British TV Channel 4. The program featured lengthy interviews with many of the main protagonists cited by Brown as "absolute fact" in "The Da Vinci Code". Arnaud de Sède, son of Gérard de Sède, stated categorically that his father and Plantard had made up the existence of the Prieuré de Sion, the cornerstone of the Jesus bloodline theory: "frankly, it was piffle", noting that the concept of a descendant of Jesus was also an