My answers:

 I happen to travel in a bus with a young "danbrown" books addicted women, Towards my journey to Neyveli, She is a christian, by religion. We discussed about the books for some times, then finally she starts to shoot out the questions.

Q: WHAT INTERESTS YOU ABOUT D.C.? 
A: I'm fascinated by power, especially veiled power. Shadow power. The National Security Agency. The National Reconnaissance Office. Opus Dei. The idea that everything happens for reasons we're not quite seeing. It reminds me of religion a little. The power that religion has is that you think nothing is random: If there's a tragedy in my life, that's God testing me or sending me a message. That's what conspiracy theorists do. They say, "The economy's terrible? Oh, that's not random. That's a bunch of rich guys in Prague who sat down and..."

Q: ARE YOU RELIGIOUS? 
A: I was raised Episcopalian, and I was very religious as a kid. Then, in eighth or ninth grade, I studied astronomy, cosmology, and the origins of the universe. I remember saying to a minister, "I don't get it. I read a book that said there was an explosion known as the Big Bang, but here it says God created heaven and Earth and the animals in seven days. Which is right?" Unfortunately, the response I got was, "Nice boys don't ask that question." A light went off, and I said, "The Bible doesn't make sense. Science makes much more sense to me." And I just gravitated away from religion.  

Q: ARE YOU A CONSPIRACY THEORIST? 
A: Not in any way, shape, or form. I am much more of a skeptic. I don't believe in UFOs or that the world is going to end in 2012. I think one reason Brown's  books have found mainstream success is that they're written from a skeptical point of view. His  protagonist, Robert Langdon, doesn't buy into any of it. As an intelligent person, you can read them and say, "Oh, that's cool--I wonder if it's possible." But you're constantly connected with a character who thinks, "That's ridiculous." If  He's doing his job, what happens is that you, the skeptical reader, move through my stories and start to say, "Oh my God. Maybe. Maybe."

Q: AND THEN YOU READ A SIDNEY SHELDON NOVEL, RIGHT?  
A: It was called   The Doomsday Conspiracy. In retrospect, it's not much. It's pretty light. But I'd never really had that much fun reading. I'd done a lot of creative writing in my home in leisure time, but it was all personal experience, and they always want you to write what you know, and I never really branched out and wrote characters.