Book is a bit beatup, but it complete and 100% usable.  Includes some modern weapons printed out from another module.

Most roleplayers fall into one of two categories: The ones that prefer the dynamics of the game (whether the action, the roleplaying or the puzzlesolving) and the tinkerers that spend hours reading and contemplating RPG modules in the way some sane people read prose.

This module is not for the roleplayers of the first category. Building your first vehicles takes a looong time. But after a while you realize that these incredibly well-thought through rules are to a very high degree compatible with other GURPS rules such as those found in Ultra-tech and Robots, and you realize you can actually build that piece of equipment you need for the next scenario (whether you're a GM or player) with a minimum of fuzz.

If you like this kind of RPG engineering, this is probably the module for you. Guaranteed hours of fun and entertainment.