A collection of classic short stories by Isaac Asimov, featuring the definitive and only in-print version of “Nightfall,” as well as nineteen other early stories by Asimov, one of history’s most influential writers of science fiction. The twenty short works of fiction in this collection, arranged in order of publication from 1941 to 1967, were selected by Isaac Asimov himself, who prefaced each story with an introduction. It begins with “Nightfall,” the tale of a world with eternal sun suddenly plunged into total darkness and utter madness. Published when the author was only twenty-one, “Nightfall” was arguably his 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.