Malice of the Medusa

From the cover:

"In the slums of a small desert-shrouded city, the malformed and degenerate huddle in darkened alleys, their ranks growing with each passing year. More and more children are birthed with horrible snake-like deformities, a result of the creeping influence of demon worship among the downtrodden of society. Now a troubling plague has befallen the higher castes: inexplicably and without warning, members of the ruling elite catch fire and within moments are reduced to mere bones. Terrified and powerless, they turn to the heroes for salvation. All the clues point to one place: the lair of a powerful medusa and her spiteful curses..."