It's just fiction. With inaccuracies but who cares? http://en.wikipedia.org/wiki/Inaccuracies_in_The_Da_Vinci_Code

Yes, I do believe that it is a book. I believe it because I saw it in the bookshop.

I would notice, that the women's opinions above are somehow different from the men's ones. "a lot of secrets in the picture" - just pretty simple puzzles (which could be simply resolved by kids), in fact ;) "Very interesting author's opinion " - just a fantasy to make the book/ movie interesting for those like you. ;) "Den Brawn is a very talented person" - and a handsome man, I am sure ;) Women's logic...

An example of mediocre literature for teenagers. As for me I believe in existing of Hogwarts School of Whitchcraft and Wizardry. :) Just because it's a good example of teenagers literature. If you are psychologically ready to admit that Dan Brown is not a genius who fearlessly reveal ancient mysteries, read Umberto Eco "Foucault's Pendulum" .

I've read this book! It's cool! Very interesting author's opinion and version of interpretation. Den Brawn is a very talented person.