Dan Brown, author of the popular book The Da Vinci Code has been overwhelmed by the popularity of his book. He has to lead the life of a modern celebrity, almost like a rockstar. People will ask him for autographs at any occassion.He is working on his next book, doing research for it. But the research is hindered by his popularity, he can't sit in a public place for checking surroundings like he did for The Da Vinci Code in the Louvre.
Source: an article in The Register-Guard.