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) of calumnies, offences, and historical and theological errors". Cardinal Francis Arinze, in a documentary called "The Da Vinci Code: A Masterful Deception", urged unspecified legal action against the makers of the film. He was formerly Prefect of the Congregation for Divine Worship and the Discipline of the Sacraments in the Vatican. Stating that it does not intend to organize any boycotts, Opus Dei (the Catholic organization that is featured prominently in the novel and the film) released a statement on February 14, 2006, asking Sony Pictures to consider editing the soon-to-be-released film so that it would not contain references that