Angels and Demons, while as terrible a book as are all of Dan Brown's books, is much better than
The DaVinci Code. It introduces the main character of
DaVinci, the symbology professor (I can't even think of his name now) during a Papal election at the Vatican. Over the top but less grotesque (until the climactic ending, that is) than the other one. Neither one of these is quite as bad as
Digital Fortress, however, a book I urge you earnestly to avoid. You don't need to read it. I did it for you, to my sorrow. No, don't thank me. It's the least I could do to maintain my standing as Top Nerd of A2k. Dlowan has answered the poster's question with her links.
Good luck in your search for enlightenment, nate2nice, and I hope you get a good grade.