The Hidden City — David Eddings

WAR TO THE DEATH

The Pandion Knight Sparhawk had bested the massed forces of the God Cyrgon upon the field of battle. But victory turned to ashes when the foul God's minions kidnapped Sparhawk's wife, the beautiful Queen Ehlana. Sparhawk must surrender Bhelliom, the awesome jewel of power--or Ehlana would die.

But Cyrgon's lackeys had misjudged their foe. Sparhawk fought on, and none of his companions flinched from the awesome struggle, though each must vanquish forces of evil from Tamuli's dark past, and from fetid places beyond human ken.

Still, the full magnitude of their peril was yet to be revealed ...Cyrgon had dared the unthinkable: He had called forth Klael, Bhelliom's opposite, to rend the very world asunder. Thus, as it had ever been decreed, would Bhelliom and Klael contend for the fate of this world--even as the man Sparhawk must finally face the God Cyrgon, in mortal combat and alone...