From the back cover: ACTION AND ADVENTURE ON THE MOONS OF MONGO! Moons of Mongo provides GMs with all the information they need to run games on Mongo’s twin moons of moons of [sic] Exila and Lunita. Inside you’ll find background information, maps, details [sic] new items, enemies, and two full-length adventures. Track down a kidnapped spy on Exila or survive a freak electromagnetic storm over Lunita!