Shane and Jonah 7: Traitor's Trail

A fabulous fortune in Aztec treasure was said to be hidden away in the Guadalupe Mountains, all that remained of the long-dead Tenoctitlan race. But finding it was the key, for the Guadalupes were not only vast and dangerous, they were also inhabited by Apaches who considered them to be sacred ground, and had sworn to kill any invader.
Pedro Mantez knew where the treasure lay, but before he could mount an expedition, he needed protection. He chose to hire the best … Shane Preston and his partner, old Jonah Jones.
Along the way they would tangle with robbers, bloodthirsty Indians and, in some cases, their own obsessive greed. Guns would blaze and men would die.
But the real enemy remained in the shadows throughout it all, content to watch as the Mexican rancher and his evil companions destroyed each other ... He was the Aztec god of war, destruction and death!