The Mad God's Amulet

From the back cover:

One Man against the Darkness.

Having braved incredible dangers and hardships, and wearied by his battle against the science-sorcery of the Dark Empire Dorian Hawkmoon was returning to his adopted homeland of Kamarg.

But even worse awaited him.

His betrothed Yisselda had been abducted by the Mad God, an evil sorcerer who had usurped the Red Amulet of the Runestaff. The amulet gave the power of the Runestaff itself to its possessor, and the Mad God was perverting that mighty power to his own unimaginably evil ends. Even as the destructive shadow of the Dark Empire spread across the world, Hawkmoon knew that only he could rescue Yisselda - and the Red Amulet - from the Mad God.

But had he, a man, the power to overcome a God?