Long Road to Revenge by Eugene Clifton
A stage coach is robbed, and there are no witnesses; every soul who was aboard is missing or dead. With his sister among those who were killed, Cole Garvin swears he'll not rest until those responsible are six feet under. He's not the only one seeking out the murderers, but it's hard to know who can be trusted. Tracking down a gang of ruthless outlaws is no job for a peace loving rancher, and Garvin leaves his scruples behind to take up the way of the gun. When he meets a special lady it's just too bad; there's no time for love on the road to revenge.