The 24th Century Technical Manual
The 24th Century Technical Manual is a two-volume unauthorized production, published in 1989 and 1990. But unlike other fan productions of the era it neither contains fan fiction nor fan art, but rather a collection of graphical behind-the-scenes production material produced by Andrew Probert, Rick Sternbach and Michael Okuda without further commentary. Material, covering the first three seasons of , was provided by fans and collectors who themselves obtained it, most likely surreptitiously, from studio staffers.

Summary
From the "Special Acknowledgments", Volume 1, p. 2
This publication is a special edition of the fanzine Galaxy Class, which is published as a "not-for-profit" means of communication between fans of the television series "Star Trek The Next Generation", it is not intended as a merchandising endeavor.

Contents
Both volumes organized the material in four sections:
 Section One: "Ships"
 Section Two: "Props and Equipment"
 Section Three: "Displays and Instruments"
 Section Four: "Miscellaneous and Behind the Scenes"

Background information
 Much of the reproduced production art stemmed from the first, 1989, edition of Star Trek: The Next Generation Writers' Technical Manual, an internal studio document, which on-call studio staffer Greg R. Stone had previously leaked to the outside world.
 Volume one contains in section four black and white photographs, surreptitiously taken by Stone (for which he was dutifully credited) of the build-up of the original Borg cube model as well as photos of the completed maquette of the engine room of the , slated to appear in  in a scene showing the subatomic bacteria eating through the hull, before that scene was cut at the last moment.
 Despite the disclaimer, this is one of the relatively few unlicensed and/or unauthorized Star Trek publications that is actually also illegal. Only containing actual production materials, it formally constitutes a case of "trade secrets theft", punishable under Federal law. A decade earlier, in February 1979, a man was arrested by the FBI who had stolen a set of  construction blueprints, trying to sell it to a local fanclub. The culprit was shortly thereafter convicted, given two years' probation, and fined US$750 for selling stolen trade secrets. (New West magazine, 26 March 1979, p. 60) However, no such actions are known in this particular instance.
 Being a special edition of a fanzine, the quality of the publication was reflected as such, photo copied in black and white and side-stapled (though a "Deluxe", plastic spiral comb-bound, edition was available). Still, it ranks amongst the earliest collections of production materials accessible to the general public before officially licensed material became available, starting with Star Trek: The Next Generation Technical Manual a year later.

Cover gallery

24th Century Technical Manual