I sometimes say that everyone who comes to the Santa Fe Institute should read at least two Lem novels. Lem's science fiction is heavily influenced by cybernetics, sort of a precursor to the complex systems work that goes on at SFI. Lem's novels Solaris and His Master's Voice are highly influential for me.
Eden is pretty good, but I fear I'm beginning to tire of the Stanislaw Lem thing. Six people crash their rocket on a new planet and are forced to learn something about their surroundings before repairing their ship and escaping. The fun here is the complete incomprehensibility of the alien culture: they keep encountering new things and making hypotheses that are clearly wrong. It's a good premise for a book, but I wasn't entirely thrilled with the execution.