Alternate Worlds

<p> <I>Alternate Worlds</I> was first published in 1975 and became an instant classic, winning a Hugo award. This third edition brings the history of science fiction up to date, covering developments over the past forty years--a period that has seen the advent of technologies only imagined in the genre's Golden Age.</p><p> As a literature of change, science fiction has become ever more meaningful, presaging dangers to humanity and, as Alvin Toffler wrote, guarding a