Looking for a book that's Morbid yet comical?

I'm looking for a book that will entertain me. I want something that is morbid, but I want it to be light and funny at the same time. Letters from earth by mark twain is a kind of example. Also anything that has to do with human nature would be nice. Hamlet is an example. I just really want to get into a book right now. ANYTHING would be nice.