From one of historys most influential writers of science fiction comes this collection of twenty short works of fiction, arranged in order of publication from 1941 to 1967. Compiled by Asimov himself, who prefaced each story with an introduction, it begins with "Nightfall," the tale of a world with eternal sun that is suddenly plunged into total darkness and utter madness. Published when the author was only twenty-one, "Nightfall" was arguably Asimovs breakout work, making such an impression that, almost thirty years later, the Science Fiction Writers of America voted it the best science-fiction short story ever written.