Slaughterhouse-Five is the top of the heap, Vonnegut-wise. If you read only one Vonnegut, read that... and if you've never read Vonnegut, for God's sake, read that!
Other good ones include Bluebeard and Cat's Cradle. Welcome to the Monkey House is great, too, if you're into short stories.
Dude! I was so gonna suggest "As I Lay Dying."
If you wanna go reeeeally classic, read "Rime of the Ancient Mariner." Granted, it's a poem and not a novel or something, but I really got into it.
Any other classic works of litertature that hold a special place in people's hearts? Preferably the less christian the better no offense to christians. I found Moby Dick to be WAY to christian and preachy about religion.
Anything Iron Maiden is great. 😉
When I was in highschool, we had a program that forced us to read books. But then when you're force to anwser questions on a test on the book you read, referencing the most mundane and uninteresting parts of the book, your passion for reading dies faster than a man on fire in a house soaked in gas. .