From the back cover: Each of the underground races in this volume has page after page of specialized weapons, lifestyle and religious notes, training packages, spell lists, and much more! In Races & Cultures: Underground Races you get: A full write-up on every one of the underground races presented in Creatures & Monsters (a total of 13 races with more than half a dozen pages on each race). Each write-up contains detailed information about religion, style of clothing, weaponry, armament, lifestyles, and more. Training packages unique to members of a given races that represent special kinds of lifestyles and vocations found only among members of the race. Spell lists available only to members of a given race that represent special magical abilities of certain races. Full adolescent development tables that are completely compatible with the RMSS.