The last gun / Peter Wilson.

Jack Crawford, badly wounded in the final action of the Civil War, returns home to find it much changed. His parents have been massacred, and the family ranch has fallen into the hands of empire-building newcomer, Vic Bannon. Crawford becomes town sheriff and finds himself in opposition to the ruthless Bannon. Crawford is dismayed to discover his own brother Clay has teamed up with Bannon to force the homesteaders and farmers out of the valley. As the threat of range war looms amidst bitterness, murder and blackmail, Crawford must step up to the mark and defend the home he now barely recognizes, before it disappears forever.