Definitly read "The Da Vinci Code" It's an excellent book.
I also recommend reading Dan Brown's other works (I have read them all) "Angels and Demons", "Deception Point" and "Digital Fortress".
I am currently re-reading the Harry Potter Books (which I also recommend...it's my one obsession and I don't care
).
Another book I recommend is called "e". It's hysterical. The book is entirely comprised of fictious emails from an advertising agency in London.