The heroes track down the cult of the Forgotten Pharaoh to its secretheadquarters inside a giant sphinx statue in the Osirian desert, facingscorpion-men mercenaries and Areshkagal-worshiping maftets before a finalconfrontation with masked cultists and their leader, the Forgotten Pharaoh, whohas been possessed by a fragment of Hakotep I's soul! Continuing the Mummy's Mask Adventure Path, Secrets of the Sphinxis a Pathfinder Roleplaying Game adventure for 10th-level characters.A selection of new monsters, two additional desert locales to expand theMummy's Mask campaign, details on the ancient curses of Osirion,and the next installment of the Pathfinder's Journal written by Amber E.Scott round out this volume of the Pathfinder AdventurePath.