From publisher blurb: Welcome to Gathox Vertical Slum, a far out, gonzo science fantasy campaign setting for Swords & Wizardry White Box Edition and other classic tabletop role playing games. Aliens, mutants, spellslingers, and hardened criminals struggle for dominance in a lawless city built upon the back of a wandering, world-hopping godling. Inside this tome you’ll find: A fully mapped and fleshed out Vertical Slum, stuffed to the gills with greedy factions, hook-laden NPCs, and seedy locations. A new gangland system for running domain-level games at level 1. 43 fully illustrated strange and inimical monsters to spring on unsuspecting players. New classes, skills, ability checks, hirelings, and gear for players to work their will across the mean streets of the Great Spire. A vertical dungeon introductory adventure to test the skills and resourcefulness of new and seasoned players alike. Over a hundred lavish interior illustrations by D.L. Johnson. Five pieces of interconnected chapter fiction contributed by Josh Wagner.