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 (film) adaptation of "The Da Vinci Code"." The film was poorly received at the Cannes Film Festival, where it debuted. Michael Medved gave the film a negative review, citing it as "an attack on religion". Anthony Lane of "The New Yorker" addressed the concerns of Catholics in his film review, stating that the film "is self-evident, spirit-lowering tripe that could not conceivably cause a single member of the flock to turn aside from the faith." In his "Movie Guide", Leonard Maltin called the film "a letdown in every respect." Director Howard noted that the overwhelmingly negative reviews were "frustrating" to him.