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
Criticism of The Da Vinci Code on the level of generalized or otherwise unprotectable ideas." He affirmed that "The Da Vinci Code" does not infringe upon copyrights held by Perdue. In February 2006, Michael Baigent and Richard Leigh, two of the three authors of "Holy Blood, Holy Grail", took the UK publisher of "The Da Vinci Code" to court for breach of copyright, alleging plagiarism. Some sources suggested the lawsuit was a publicity stunt intended to boost sales of "The Holy Blood and the Holy Grail" (a boost which did in fact occur). However, the projected court costs of over 1 million pounds outweigh or at