Direct Link: A Guide to the Star Wars Universe, Fourth Edition, Completely Re-revised and Expanded
(includes updated material from all six Star Wars motion pictures, comics, novels, computer games, and d20 RPG)
Direct Link: A Guide to the Sci-Fi Universe, First Edition
(includes material from Babylon 5, Stargate SG-1 and Atlantis, Battlestar Galactica, Farscape, Dune, and MORE!)
Direct Link: A Guide to the Superhero Universe, First Edition
(includes material from Marvel Comics, DC Comics, Dark Horse Comics, movies, and MORE!)