At the tail end of a dying Old West, a drifting cowpoke drifts right into a range war in Alan LeMay's Gunsight Trail.
This is an early oater from LeMay, who had great later success in his writing, including having works like The Searchers and The Unforgiven turned into memorable films.
This is a pretty standard western up to a point, with the cowpoke falling for one of the rancher's daughter and throwing in his luck with her family, up until a pretty bleak standoff at the end (that actually reminded me of the coda in the later novel The Searchers).
Still, standard LeMay is a cut above most cowboy writers, and I would recommend it to western fans.
I got this cheap for my beloved Kindle and read it quickly.