From the Paizo website:
The sands of the desert are unforgiving, and those who show weakness rarely survive. Beset by gnolls and genies, can the heroes stop a wish-maddened warlord from raising one of the infamous Spawn of Rovagug, a living holocaust cast down millennia before? In order to do so, they'll need to brave sand, flame, and the terrors of the Outer Planes—yet the forces at work against them are limited only by the reach of their imagination. And the enemy has had thousands of years to prepare...
The Legacy of Fire Adventure Path begins in the desert nation of Katapesh, where the heroes must attempt to retake a conquered town from a pack of fearsome gnolls. From there, the trail leads to the fortress known as the House of the Beast, an ancient map-world created by one of the most powerful wizards in history, and even the legendary City of Brass on the Plane of Fire.
Part of the ongoing Pathfinder Adventure Path series from Paizo Publishing.
Pathfinder Adventure Path #19: "Howl of the Carrion King" (Legacy of Fire 1 of 6)
Pathfinder Adventure Path #20: "House of the Beast" (Legacy of Fire 2 of 6)
Pathfinder Adventure Path #21: "The Jackal's Price" (Legacy of Fire 3 of 6)
Pathfinder Adventure Path #22: "The End of Eternity" (Legacy of Fire 4 of 6)
Pathfinder Adventure Path #23: "The Impossible Eye" (Legacy of Fire 5 of 6)
Pathfinder Adventure Path #24: "The Final Wish" (Legacy of Fire 6 of 6)
Pathfinder Companion: Legacy of Fire Player's Guide
Pathfinder Chronicles: Legacy of Fire Map Folio
GameMastery Item Cards: Legacy of Fire Deck
Pathfinder Terrain: Ruined Undercrypt of Kelmarane (based on the dungeon in Howl of the Carrion King)