The Indian ring
"A spy has infiltrated President Grant's administration. The best man to weed him out: Joshua Strongheart, a half-Lakota warrior/half-white lawman of national repute. But luck isn't on Strongheart's side. As soon as word gets out that he's on the job, a group of well-trained shooters are on his trail. Ronald M. Hartwell once worked for the Secretary of War, but he is now the leader of the Indian Ring - a deadly syndicate of criminals out to decim...