Blindsight - Peter Watts The author who kept running through my head while reading this was Julian Jaynes, whose The Origin of Consciousness in the Breakdown of the Bicameral Mind I read in March of this year. The alien, Rorschach is the kind of unconscious intelligence Jaynes believes humans were until quite recently. And Watts' exploration of consciousness, unconsciousness, identity and motivation were interesting.

I'd recommend this to anyone interested in those ideas, and for a story about "first contact" and why we might not want to look forward to it so eagerly.