Ten and Me — Johnny D. Boggs

They are unlikely partners: Jack Mackinnon, an even-tempered drifter and part-time gunsmith, and Tenedore Keogh, a consumptive dentist-turned-gunman looking for a quicker way to die. Recruited by the Texas Rangers because of their prowess with guns, MacKinnon and Keogh become national celebrities through the novels of Robin K. Hunter-- the woman both men love.