McAllister 5: Quarry

Week in and week out, McAllister remorselessly followed his quarry across the Wind River Country and down into the arid flats of the Humboldt Basin.
Their final duel would be a clash of giants, one master pitting his skill against another’s. For they were two men at the peak of their professions—one a lawman, the other a thief and killer.
Cunning against cunning...
Gun against gun ...
Totally without pity.