Iron Heart by Jory Sherman
Approx. 50,060 words.
Published on December 5, 2013 by
Violence stole young Ben Brand's family from him, but blessed with uncanny speed and skill with a gun and befriended by an old mountain man, Ben sets out on a bloody quest for vengeance. As he tracks his enemies over the years and the miles, Ben battles men and the elements—and risks his own soul—to become the avenging nemesis known as Iron Heart!
Originally published under pen-name Walt Denver.