Winter has finally come! Discover the frozen mysteries and chilling dangersof the nation of Irrisen, the Pathfinder campaign setting's realmof hearty heroes, merciless magic, and icy evil. Confront the freezing ambitionsof the land's proud rulers, the winter witches; hunt magical monstrositiesborn amid endless blizzards; and learn the cycle of the realm's frigidrulers, the infamous daughters of Baba Yaga. With details on the nation'smajor settlements, sinister adventure sites, new rules for wintry dangers, hostsof icy monsters and native NPCs, and plots to inspire whole campaigns, thisshiver-inducing sourcebook gives GMs everything they need to adventure acrossthis realm of wintry wonder. All the details on Irrisen's dangers anddenizens also makes this the perfect companion for GMs running the chilling newReign of Winter Adventure Path. Unleash a storm of icy evil upon yourcampaign with Pathfinder Campaign Setting: Irrisen -- Land of EternalWinter!