Arguably the best story about first contact ever written. A ship comes careening into a human system. The pilot is dead, and strange, and it has apparently traveled for years at sublight speeds to get there. Even more strange is the fact that the ship hardly seems enough to sustain it. Two ships are dispatched to a star system hidden inside a nebula to contact the aliens. The society of “Moties” they find is very strange, and very fascinating, almost as fascinating as the creatures themselves. What they fail to realize is that the truth behind Motie society is deeply disturbing and will be a danger to all humanity.
It has aged very slightly due to the its being written in the seventies, but this hardly detracts from the magnificence of this novel. Manages to capture the essence of encountering the truly alien, and how humans have a hard time not placing their own values and prejudices on that which they do not understand.