Out by Natsuo Kirino, quite dark
Most books by Tom Holt, fairly insane
Journey to the West by Wu Cheng'en, quite funny and insane
Hitchikers guide to the galaxy, Douglas Adam
Alone in Berlin by Hans Fallada, great story about German resistance during WWII
Memoirs of a Geisha by Arthur Golden, feels like a biography but fictional, much better than the film
The Hobbit by JRR Tolkien
I could go on, but I'll stop for now