Hunter of Shadows — Richard Dawes

An archaeological professor disappears in the jungles of Guatemala while searching for an ancient Mayan city. The professor's daughter hires Jack Slade to go into the jungle, find him and bring him back. Slade leaves a blood spattered trail as he battles wild natives, gun runners, an evil sorceress bent on ruling the world, and finally confronts, in a battle of power, the ancient magician-king of the Mayan city.