Wasn’t The Shadow Riders based on a Sacketts novel by Louis L’Amour?
Louis L’Amour wrote the novel The Shadow Riders was based upon, but it wasn’t a Sackett story. You’re probably thinking of the mini-series “The Sacketts”, in which both Selleck and Eliott played major roles. We didn’t know how good we had it back in the late 70’s and early 80’s when they were making a bunch of those good mini-series. I’d sure like to see The Sacketts and Centenial again.