Uncover a world of adventure and claim your fortune in Pathfinder Online: Thornkeep! This detailed sourcebook contains everything a GM needs to run adventures in and around the dastardly town of Thornkeep, as well as several deadly dungeon levels and a sneak peek at the upcoming massively multiplayer online game Pathfinder Online.

While the lives of most Pathfinder Society field agents is brutal and short, some rise to prominence, drawing the attention of the Decemvirate. These lucky agents are invited to a little known siege castle outside Absalom where they are asked to test their mettle. Those who succeed get their choice of prestigious missions, whereas those who fail are rarely heard from again. The players are run through an arena-style dungeon, faced with monsters, traps, and puzzles.

A handful of would-be adventurers gathers to explore an ancient tomb, eager to trade their discoveries for a ticket to a better life. What they find within presages the advent of the Age of Worms, an era of darkness, decay, and writhing doom. "The Whispering Cairn" is the first installment of the Age of Worms Adventure Path, a complete campaign consisting of 12 adventures, several "Backdrop" articles to help Dungeon masters run the series, and a handful of poster maps of key locations. For additional aid in running this campaign, check out Dragon's monthly "Worm Food" articles, a series that provides additional materials to help players survive this campaign. Pgs. 14-47

For ages untold, a gemstone monolith has pierced the heart of the Echo Wood. Now, as civilization intrudes upon this enigmatic splinter, a strange life once again stirs in the depths—one with ties to undying evils and a might beyond time itself. The promise of wealth and power calls to glory-seekers from across the Inner Sea region, tempting them into a labyrinth of monster-haunted vaults, defiled tombs, arcane laboratories, and worse, as they seek to unveil the secrets locked below the legendary Emerald Spire.