Sagebrush Sleuth — J.T. Edson

Arizona was wide open. The whole damn territory was easy-pickins for any two-bit cow-thief, back shooting gunslick, or blood-simple outlaw. The law belonged to the fastest gun. And justice was in the hands of fools and cowards. So when cattle baron Bertram Mosehan formed the Rangers, he needed a special breed of man. Doc Leroy was one. And Waco was another. They fought with Ole Devil Hardin. And now they were out to tame the territory...