A man without memory, tied by blood to a city of robots. At his side, a mysterious woman whose life and memory he saved, whose love he has won for a second time. His name is Derec; hers is Ariel. And their story has only begun to be told. . . In Robot City, the late science fiction genius Isaac Asimov challenged a talented group of science fiction writers to resolve the conundrums he set for them in the context of his famous Three Laws of Robotics. In Robots and Aliens, a new challenge was put forth: What would happen if the robots of Asimov¹s universe were to meet alien races? Would the Three Laws that protect both humans and robots still apply when dealing with a species that is neither . . . ? This pair of adventures, enhanced with a pair of essays by Asimov himself, continue the saga of Robot City, where the finest minds in science fiction enter the most futuristic landscape in robot history!