A documented pictorial checklist of the SF world -- concepts, themes, books, mags, comics, films, TV, radio, art, fandom, cults, personal commentaries by the greatest names in SF writing. This encyclopedia includes contributions from Brian Aldiss, Poul Anderson, Isaac Asimov, J.G. Ballard, John Brunner, Ken Bulmer, Arthur C. Clarke, Lester del Rey, Philip Jose Farmer, Harry Harrison, Fritz Leiber, Larry Niven, Frederik Pohl, Keith Roberts, Josephine Saxton, Robert Sheckley, A.E. Van Vogt, James White, and Jack Williamson.