(Part of the original Foundation Trilogy, winner of the Hugo Award for Best All-Time Novel Series) The descent of the Empire into chaos has occurred, just as Hari Seldon predicted it would, in this second novel of Isaac Asimov's monumental Foundation saga-a central masterwork of modern science fiction that merited a special Hugo Award for Best All-Time Novel Series. The Seldon Plan even accounted for war between the Foundation-the library of all knowledge, intended to help humanity survive the catastrophe-and the remnants of the Empire. But Seldon could not have imagined the rise of the mutant superbeing known as the Mule, whose conquests are effortless and whose subjects are mind-controlled slaves.