Originally Posted by RB
The Catcher in the Rye - J.D. Salinger
Lord of the Flies - William Gerald Golding
Animal Farm - George Orwell
The Great Gatsby - F. Scott Fitzgerald
The Scarlet Letter - Nathaniel Hawthorne
Death of A Salesman - Arthur Miller
I liked those, and I'd add The Stranger by Albert Camus, and Crime and Punishment by Dostoevksy.
If you want something a little easier, I recently read The Da Vinci Code, and I thought it was pretty good.