No one goes to Illmarsh, a decrepit village haunted by tales of ghastly midnight rites and sacrifices to shadows from the sea. When the heroes learn of an unholy bargain between the cultists of the Whispering Way and the drowned gods of this wretched town, they must journey through a wilderness gone wrong to prevent it. Can the heroes discover what foulness festers in the mind of Illmarsh and withstand the whispers of an insanity from beyond the stars? A Pathfinder Roleplaying Game adventure for 9th-level characters, this volume continues the Carrion Crown Adventure Path, drawing on themes of classic horror stories long awaited by players. The heroes will investigate lands inspired by the mind-bending horrors of H.P. Lovecraft and face off against terrifying foes drawn from his ever-popular Cthulhu Mythos. This volume also introduces the unimaginable terrors of the Elder Gods to the Pathfinder campaign setting with an expanded Bestiary unleashing a host of maddening Lovecraftian monsters, plus much more including new fiction in the Pathfinder's Journal!