The Pathfinder Roleplaying Game builds on more than 10 years of system development and the largest open playtest in the history of tabletop gaming to create an unparalleled fantasy roleplaying experience. Players need only the Pathfinder RPG Core Rulebook to play, but Paizo Publishing produces a wide range of books and accessories to enhance your Pathfinder experience, from hardcover rules compendiums to complete campaigns to packets of beautiful full-color maps.
Pathfinder Roleplaying Game books and accessories focus on the core rules of the game, expanding player character options and helping Game Masters run engaging adventures and campaigns. These expansive, beautifully illustrated volumes focus strictly on rules and options, making them suitable for use with any campaign setting.
Pathfinder Adventure Path provides a complete campaign in the course of six monthly installments. Each 96-page full-color softcover volume contains a huge adventure, ecology and statistics for several new monsters, support articles like city and regional gazetteers, short fiction, and more.
Quoted from the Paizo.com webstore