Here's what you get:
Strange Space Encounters
A few things that can happen between planets, supplied by Tim Callahan. Included are write-ups for the Cactus Men of Alpha Centauri, the Moon Octopus, Space Pirates of Pluto, Spore Slavers, Violent Voidspace, and the White Martian Tribunal.
Tim Callahan supplies a new class, which combines magic and technology. If you are running a Crawling Under a Broken Moon campaign, you may discover that this is an interesting compliment to the Technologist in Crawling Under a Broken Moon #1.
New Spells for Crawljammer
Because the Technomancer requires new spells, Tim Callahan provides them. Specifically: Hyper-Repair, Speed, and Trap Engineering. One could easily imagine uses for these spells outside the Crawljammer milieu, and Hyper-Repair may be especially useful when Crawling Under a Broken Moon.
Hail Bob’s: The Coldest Drinks in the Phlogiston Flux
Author Tom Hall introduces Hail Bob's, a bar affixed to a comet, a table to create some random "vagabonds" who might be drinking there (including plot hooks!), and a table for creating cool random space cocktails. This is very reminiscent of some of the earlier science fantasy pulps - in particular, I am reminded of the "Northwest Smith" stores of C.L. Moore and some of Leigh Brackett and Frederic Brown's work.
Red Planet Rendezvous: The Arcadian
A 2nd level adventure by Tim Callahan sees the PCs explore a disabled prison ship in orbit around Mars. Needless to say, all is not as it seems, and hi-jinks ensue.