From publisher blurb:
The cult of Hastur no longer threatens Thrushmoor, and now the adventurers discover the final clues needed to solve the enigma of their lost memories. Boarding a riverboat to Cassomir, the adventurers begin researching the manuscripts found in Iris Hill during the previous adventure. From these esoteric tomes, the adventurers discover a ritual that allows them to explore the Dreamlands in order to reclaim the parts of their minds they lost and track down their obsessed and corrupted former employer. After completing a number of bizarre and demanding dream quests, the adventurers find the answer to their fragmented minds, but they learn a greater threat looms over Golarion. Can they survive the perilous Dreamlands and emerge complete or will the adventurers be stranded in a dimension of nightmares?
“Dreams of the Yellow King” is a Pathfinder Roleplaying Game adventure for 7th-level characters. The adventure continues the Strange Aeons Adventure Path, a twisted delve into madness that pits the heroes against the cosmic horrors of the Cthulhu Mythos. Several new monsters, a look at encounters found along the Sellen River, and the next installment of the Pathfinder’s Journal round out this volume of the Pathfinder Adventure Path.