The Ambush of My Name — Jeffrey Marks

When General Ulysses Grant returns to Georgetown, Ohio where he grew up he expects to be hailed as a hero. But as soon as he sets foot in the place people are calling him a butcher and he finds a dead body in his hotel room. Who it is nobody knows and he has to try to find out whodunit hampered by the fact his disapproving wife has just bumped into his old flame, one of his bitterest enemies from boyhood is running the telegraph office that just happens to be having trouble and both a Pinkerton agent and a local reporter want to help out. Suddenly fighting the Civil War doesn't seem so hard!