Philip Roth - Indignation. This was recommended on this thread as one of the better short/late Roth novels and it really is. I enjoyed it a lot more than Everyman or Exit Ghost. The scene in the Dean's office where he ends up puking is hilarious. I actually read this in one evening.
I'm glad you liked it, just don't spoil it by reading The Humbling. Steaming pile of shite.