Bloody sands

The Doc and Raider series of Westerns followed the adventures of two Pinkerton agents -- Raider, a kind of "Arkansas good old boy" and Doc, a rather well-to-do doctor from the East. There were a total of over 70 novels in the series, produced throughout the mid to late 80's. The books were first published by Playboy Books, then Berkeley Books produced most of the titles in the series.