The King Hill War — Robert Vaughan

The memory of all the good men he killed during the Civil War still haunts former Captain Mason Hawke--fathers, sons, brothers, and husbands, who just happened to be wearing Union blue. Now only bad men can enflame his killing rage.

A drifter who makes his living playing piano in frontier saloons, Hawke has come to a blood-soaked corner of Idaho, answering a desperate call for help from a woman he once loved. War is ripping King Hill apart--born of the ruthless greed of wealthy cattlemen--and it threatens to expose Hawke's tragic history. But Cynthia Macgregor and her husband Ian know what he can do, and that he's their only hope against the professional firepower lining up against them. The enemy has the numbers, but the Macgregors have Mason Hawke.