Your Absolute Favorite Book?

I'm just curious if you guys have a favorite book; one that really stands above all the other great books you've read?

I know I couldn't make a list of my top 5 favorites, there's just too many, but I can say without a doubt that The Brothers Karamazov is #1. It really changed my view of the world.

Share yours.

A Scanner Darkly.  A lot of Philip K. Dick's stuff is awesome, but I "read" that one as an audio book and it packed a hell of a punch for me, since I have positively no experience with drug culture.

The whole ... well, I won't ruin it.  It's worth your time for both the characters and the story.  Read until the end.