Keep your eyes open for Quicksand. I can't recommend it yet as I haven't read it, but I enjoyed Fraction of a Whole immensely ... dark humor, nihilistic ... hugely philosophic.
My shelf is full. I may have to hit the library. Wow, it's been a long time since I needed the library. I tell you, I am finicky when it comes to fiction. Toltz has got a very dark sense of humor.
I tried reading Infinite Jest ... I even read some companion books to motivate me.
Anyway, I put in a good 12 hours of quality learning, and I think I should quit while I'm ahead so as not to kill my rekindled enthusiasm for mathematics and programming. I know there are the nihilistic and philosophical works ... the companions to Schopenhauer ... the verbose French philosophers, I know ... Maybe I'll just stare at the moon.