o man, what a good question. there have been a few, but off the top of my head I'd have to say:

-The Qu'ran
-Crime and Punishment
-Siddhartha
-The Bhagvad-Gita (the first 10 chapters or so, basically the whole scenario of arjuana refusing to wage war on his family and god telling how he must preform his "sacred duty". it makes my skin crawl.)