Zebulon's Guide to Frontier Space is a rules supplement for the Star Frontiers game universe with additional rules, equipment and setting information. Designed as a continuing series, it was the only volume ever printed. It describes itself in its own words: "In FY 110 (Frontier Year 110) something new appeared in the frontier. It was an encyclopedia complied by the University of Zebulon documenting all known flora, fauna, cultures, devices and history of the frontier in one place."