The Star Trek Encyclopedia by Debbie Mirek, Denise Okuda, Michael Okuda (1994, Paperback)

If you're looking for a complete guide to everything Star Trek, then this is the book you're looking for! It is an unbelievably complete reference of every location, planet, ship, species, sector, and more from "A&A Officer" to "Zytchin III." It also includes a brief plot summary of every Star Trek episode from The Original Series (TOS) to the first season of Deep Space 9 (DS9). It really is an encyclopedia since it has thousands of entries covering everything Star Trek. It's even educational since you learn about terms such as heading and mark. <g> Overall, this is a book that every Star Trek fan *has* to have. I regrettably give it a 4/5 only because it's outdated (it doesn't cover the majority of DS9 or later Star Treks such as Voyager), and I would recommend getting the newer version (ISBN 0671536095), but this book is still a must for any Star Trek lover!