Blood Flows in the East — Michael E. Cook

The cow town is becoming rowdier all the time. Sean's wife Maggie doesn't want to raise a child in such a place. Sean's best friend Michael and his wife Betty have had enough. They go back East in search of peaceful surroundings, but soon find that the West is not the only place filled with outlawry. When there is trouble, Sean heads East to clean house. Law in the East is different than O'Rourke's law out West, but Sean gets the job done the only way he knows how.