I'm totally just cut and pasting this from my guild forum, but it's still applicable:
Hardboiled Wonderland and the End of the World
by Haruki Murakami
Surrealism without being overly pretentious or obtuse. The reality in Murakami's worlds all seem paper-thin: you can see shadows of things moving around on the other side, but you only ever get glimpses. I really cannot recommend his writing enough, though this is my favorite of his. I also heartily suggest A Wild Sheep Chase
if you like the surreal, or Norwegian Wood
if you want something a little more human.
On the completely other end of the spectrum:
by Azuma Kiyohiko
This is like the comic version of a pile of puppies. No matter how many times I read it, it always always makes my day better. By the same guy who did Azumanga Daioh, but it's actually better
. I've gotten a couple of people in the office totally hooked on this.
written by Bill Willingham
Epic graphic novel series about various fables living in the modern day world in secret. I can't think of a way to describe this series that actually does it justice, but trust me it is worth the read. The first book is mostly just a neat story, but they get increasingly better from there.
Oh, and Discworld. Discworld, Discworld, Discworld. Have you read any Discworld yet? Because seriously, go read Discworld.