OMENSETTER'S LUCK by William H. Gass. 304 pages. New American Library. $5.95.
"Pale, pinch-faced little Jethro Furber, the nail-eyed reverend, was nothing but bones, and even those you could have wrapped in a hankie. His twisted figure was like a knotted string, and he hated his parishioners. With fierce Puritan intensity he preached burning, his whole inside crying die, shouting die. He worked in his garden obsessively, like a madman picking imaginary lint from his sleeve. He wanted women, imagined them in every posture. He wrote dirty doggerel and lied—his single skill. He...