I'll second Cyberiad. Also, I've heard some people describe Lem's "Solaris" as one of the few science fiction novels that also qualify as great literature, alt

I'll second Cyberiad. Also, I've heard some people describe Lem's "Solaris" as one of the few science fiction novels that also qualify as great literature, although I must admit I didn't enjoy it as much as Cyberiad.