platform by michel houellebecq
lila by robert pirsig (same author of zen and the art of moto...)
white noise by don delillo

just a few off the top of the head that i really enjoyed

edit - whoops fiction you say huh h:

platform is pretty philosophical
lila is sort of an autobiography but not really
white noise is just a novel

monster by Sanyika Shakur was a great bio of a gang members life