Hnnng Discworld. I read through all of them (barring the ones aimed at younger kids) in about a month a couple years back. I should do that again.
Do it. Hell even the ones aimed for younger is full of delightfull, if not as adult, wit.
Red one discworld novel, but found it a little too light for my tastes. A little too much comedy and too little serious biz.
The earlier ones are straight up parodies. I suggest reading the Watch novels.