From Near Earth Orbit out to cis-lunar space, the High Frontier of the end of the 21st century is a crowded place. Not only space settlements, labs, commercial satellites, military platforms, and transitting spacecraft, but also their junk, and the people who clean up the junk, populate this piece of vacuum.

Chapters detail Earth Orbit, Luna, L4 and L5 (The Junk Jungle), with information on the many organisations with interests in Earth orbit, as well as some of the odder space habitats. New space station designs are given, as well as new options for the core-book 's spacecraft design system.