Updated and expanded for this edition, it's the most complete, most current sf reference ever! John Clute and Peter Nicholls's Hugo Award-winning Encyclopedia of Science Fiction springs to life in this multimedia CD-ROM. Over 4,500 entries on sf authors, books, films, concepts, and themes. Extensive hyperlinks and cross-references, to lead you on an endless journey of discovery. Plus video and audio interviews, film stills and trailers, photos of sf book covers and authors, and more. The ultimate authority for SF fans.