Thieves, brigands, deposed princes, and the truly desperate inhabitants of the Pathfinder Chronicles campaign setting flock to the River Kingdoms, a motley collection of tiny enclaves whose rulers command only so far as their brute strength and mercenary armies can carve out for them. This comprehensive guidebook presents the first-ever extensive overview of this treacherous land, where any man can become a king so long as he keeps his hand on his sword and his back free of daggers. More than a dozen rogue kingdoms come alive with lavish illustrations and detailed maps in this first look at the setting for the Pathfinder Adventure Path: Kingmaker!