The Ifrit's Chosen

From the introduction:

Along the great Izgoni caravan route over the dunes of the Ulrik Wastes lie the ruins of a small settlement. Once a desert spring bubbled up here, and the settlement was a waypoint for travelers and their animals to water and rest in the shade. Though the tumbledown adobe structures are still used as emergency shelter from the many sandstorms, the settlement is generally bypassed as another dead husk amongst the dunes of Ulrik.