Could you perhaps set a harder task?
What you make it
by Michael Marshall Smith, a good collection of short stories, but nothing too thought provoking. Its one of the few books of fiction I own!
The best suggestion has to be non-fiction (sorry) and I'd recommend Prometheus Rising
by Robert Anton Wilson. It is a guide book of "how to get from here to there", an amalgam of Timothy Leary's 8-circuit model of consciousness, Gurdjieff's self-observation exercises, Alfred Korzybski's general semantics, Aleister Crowley's magical theorems, Sociobiology, Yoga, Christian Science, relativity, and quantum mechanics amongst other approaches to understanding the world around us. It sounds dull but isn't. It claims to be a short book (nearly 300 pages) about how the human mind works and how to get the most use from one, but its actually a very enjoyable, entertaining and thought provoking read.