Blood on the moon and star a frontier duo

"Two western novels featuring Bear Haskell, U.S. Deputy Marshal, who rides for Chief Marshal Henry Dade out of Denver's First District Court. Haskell's a former Union war hero and Pinkerton agent, a big man over six and a half feet tall and as broad as a barn door. He wears a necklace of bear claws taken from the grizzly that almost had him for supper. That's the kind of man Bear is. He holds a grudge and he gives no quarter--to grizzly bears or...