The Battle at Three-Cross — William Colt MacDonald

DESERT DISASTER
Lance Tolliver wants nothing more than to solve his friend's murder and go home. But his only clues are the strangest he's ever seen: a blackened right hand and a rare cactus bud found with the body. As Lance gets closer and closer to the truth, he finds a band of border terrorists, a secret Indian cult, and more--all leading to an ultimate three-way showdown between outlaws, the Yaquente tribe, and lawmen. All Lance can do is pray he solves the case before getting caught in the crossfire.