More info After a nuclear war, the Earth turned into a desert covered with radioactive dust. Animals are dying out, people are emigrating to extraterrestrial colonies. Those who remain eke out a miserable existence in crumbling cities. Police officer Rick Descartes is tasked with finding and destroying a group of androids who fled from the outer colony to Earth. But gradually Rick begins to wonder: are androids so different from humans? And where is the border that separates them? The novel was nominated for a Nebula Prize and was filmed by Ridley Scott in 1982.