The jungle nation of Sargava is a colony on the verge of the vast junglewildlands of the Mwangi Expanse, a place where numerous powerful factions clashfor control. When rumors of a route to a mythical lost city surface, fourfactions (the Red Mantis assassins, the Pathfinder Society, the Aspis Consortiummerchant league, and the Pirate Lords of the Shackles) engage in a race to bethe first to claim this lost city's treasures -- and the first step! A Pathfinder Roleplaying Game adventure for 1st-level characters,this volume of Pathfinder kicks off the highly anticipatedSerpent's Skull Adventure Path, in which the heroes brave atrackless jungle to discover the legacy of lost empires. Supplemental articlescontain rules for the four competing factions in the campaign, with tips on howthe heroes can join forces with them or contest their goals, as well as anoverview of the ancient serpentfolk of the Mwangi Expanse and their eerie magic.The Pathfinder Bestiary section introduces five all-new monsters perfect forSerpent's Skull adventuring.