Currently Reading: The Deputy Sheriff of Comanche County
One of Edgar Rice Burrough's westerns, I don't remember if I read this one when I was a kid, but I'm reading it now. If you haven't read Burroughs, you must. He is one of the great story-tellers of all time.
It, like most of the Edgar Rice Burroughs books, is available as a free download from manybooks.net.