From publisher blurb: Once from the world of Aventyr, the Sideribus Volunt are an ancient race of spacefaring humans who have adapted to life in microgravity. Without a world of their own, the Sideribus Volunt claim a network of immense space station libraries as home. With their vast and interconnected database, the greatest treasure of the Sideribus Volunt is also their greatest weapon. For in the depths of a wild and uncharted galaxy, knowledge truly is power. Star System Sets offer new planets to explore, dangers to overcome, lifeforms to study, and cultures to document. Modular enough for any campaign, each double-sided card presents a complete ruleset for ease of reference, allowing GMs to fill in the blank spots on their star charts. Card types include Race, Planet, Character Options, Equipment, Monsters, and Mini-Adventure. Each set is available à la carte or as a six-card bundle.