How about Herman Hesse. I've read three of his novels, "Steppenwolf", "Demian", and "Siddhartha" (sp?). I enjoyed each of them. I read them all in English translation. Has anyone read them in German?
Try Siddhartha first. It's different from the rest but the hero is a little more heroic and likeable. The other two might seem a little dark.
I wonder if other people who have read these books found them as deeply 'personal' as I did. It may sound silly, but have you seen the movie 'The Neverending Story' where the kid reads a book and he slowly realizes that it is about himself. Kind of creepy.