"Star Trek" Encyclopedia: A Reference Guide to the Future by Michael Okuda
Exhaustively researched and cross-referenced, the "Star Trek Encyclopedia" features main and supporting characters, detailed pop illustrations, a starship recognition chart, alien races, Starfleet uniform chart, phaser evolution chart, weapons and tools, medical equipment, inside jokes, and much more -- for a total of more than 5,000 entries worthy of study by Trekkers everywhere.