FIRE SERMON by Wright Morris. 155 pages. Harper & Row. $5.95.
Twenty-nine years and twenty-odd books ago, Wright Morris brought out of Nebraska a troop of crabbed characters, blown a little lopsided by those howling winds of the Great Plains. Ever since, he has been putting them through literary paces that have justifiably made him the most admired of America's little-read novelists.
All Morris' characters now seem to coalesce in the splendid single person of a wiry old coot named Floyd Warner. He is the hero of the author's latest novel, a terse, bright fable...