Fans of the "The Da Vinci Code" have waited for years for more of Dan Brown's mix of mystery, religion, history and art. At long last (and just a few years overdue) the sequel, "The Lost Symbol," will finally come out next week. It follows Brown's hero-savant Robert Langdon to Washington, D.C. for another mystery. People are hungering for clues as to what's in the new book, so we speak to an expert: Dan Burstein, who has made a career dispelling the myths and interpreting the clues in Brown's work. Burstein even sold over 50,000 copies of "Secrets of the Widow's Son: The Mysteries Surrounding the Sequel to The Da Vinci Code" (edited by Burstein and written by David Shugarts), where he attempted to figure out what might be in the much-anticipated sequel ... despite the fact that it hadn't been published yet. His latest book, "Secrets of The Lost Symbol: The Unauthorized Guide," is due out in December.