The Hidden City (Tamuli Series #3)

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 Tamu…