U.S. Marshall Morgan Kane reluctantly teams up with a formerly imprisoned Apache scout to hunt a bloodthirsty band of white and Mexican scalphunters in The Vultures of Sierra Madre, part of the long-running western series by Louis Masterson.
Masterson was actually Norwegian Kjell Hallbing, who wrote close to 100 books featuring Kane over an extended period of time, with a number translated into English. I find them difficult to come across in the wild, and if I see one online for less than ten dollars I will grab it up.
This was a sturdy western and seems to offer more continuity between novels than what is the norm in the usual action-driven western series. Kane talks about the death of a former love, and we see the return of an old enemy and an old friend from previous installments.
I think Masterson's westerns are a cut above and are recommended for genre fans.