From the back cover (Book One): Dazzling to behold, Gemworld is one of the wonders of the Federation: an artificial world composed entirely of crystal, its atmosphere held in place by a sophisticated network of force fields. Home to a half dozen different sentient races, this singular world is a low-gravity playpen of mammoth spires, endless fractal staircases, gemstone arcs, and dazzling prisms, oil carefully nurtured by the planet's many inhabitants -- until now.