Dan Millman's Peaceful Warrior
I would probably never read this book if I saw it in the store (a flashy subtitile "a book that chages lives", standing next to reincarnation books.... hmm). I saw a web banner for the movie preview and it caught my attention, I read the summary and I was in.
The blend of western and eastern philosophy in the book (Socrates probably needs to be called Confucious instead :) is mind opening. It makes you ask some good questions and reflect on some fundamental stuff. Will not talk about the book much, needs to be read. While I am waiting for the movie to come out, right on my birthday :)