Isaac Asimov's Robot City : Robots and Aliens #1. Changeling

While short and somewhat of a pulp scifi novel, it asks an interesting question. Based on Asimov's Robot novel, it asks what would happen if a robot is given the Laws of Robotics (a robot protect humans, a robot must serve humans, and robot must protect itself), but isn't told what a human is, then abandoned on a supposedly uninhabited planet. An interesting thought experiment in scifi robotic theory.

Despite the rather unwieldy name, and being trapped as the seventh book in a share cropping series using Asimov's name, this is actually quite a good book. The plot explores something Asimov didn't do much of (what happens when Asimovian robots meet aliens and define them as human), while not being self righteous about it. The book is also more technically competent that some of the earlier ones in the series -- it doesn't feel like it was written for seven year olds. I think this one is the best in the series so far.

http://www.stillhq.com/book/Stephen_Leigh/Isaac_Asimovs_Robot_City_Robots_and_Al...