Guardians of Fire: City of the Damned

Having vanquished foes abroad, Parsa returned to his home city of Shiraz only to find it in the clutches of terror. Once vibrant and lively streets became dark and deserted, people shut in their homes, trembling in fear. Many houses stand empty; their denizens vanished into the night under the full moon. Parsa's duty as the city watch commander is to uncover the source of this dread and face it, accompanied only by his closest retinue and whatever allies they may find in this cursed city.

—description from the publisher