"Ty Fisher And the Blood of the Mountain Men" by W.R. Benton

Ty Fisher is a man of deep honor and when fellow fur trapper Bull Singleton turns to robbing and killing his fellow trappers for their furs, he is honor bounded to see mountain justice served. Ty goes after the renegade killer with his trapping partner Crazy Wayne and the two men quickly plunge into danger, intrigue, and adventure as their hunt for the mountain man turned murderer becomes time consuming and proves to be extremely difficult. The action increases as Ty falls in love with a white woman living with the Sioux and Wayne's brother is killed by Bull.