"I was made in His image," Mark Twain once said, "but have never been mistaken for Him." God may have made Mark Twain in His image, but Twain frequently remade himself by adopting divine personae as part of his literary burlesque. Readers were delighted, rather than fooled, when Twain adopted the image of religious vocation throughout his writing career: Theologian, Missionary, Priest, Preacher, Prophet, Saint, Brother Twain, Holy Samuel, the Bishop...