His website is awesome if you want to know more about the books. Really interesting if you want to get more info on his topics.
I've only read the Da Vinci Code so far:
I know... this isn't YA. If you're only iffy about that, try it! This is the best mystery/suspence book I've read so far.
Random stuff (for people who have read the books):
... This struck me as weird: Why does the book alway begin with a dead body?
Does his other books begin with dead bodies? (Yes, this is the detail I choose to remember. : P )
Are there any other awesome books like these? Because, if there are, I need to read them!