THE DURABLE FIRE (366 pp.)Howard SwiggettHoughton Mifflin ($4).
FROM THE DARK TOWER (245 pp.)Ernst PawelMocm/V/on ($3.75).
The postwar romance between novelists and the business worlda highly tentative affair at bestmay be going pfffft. The hero of From the Dark Tower deserts his executive suite in Manhattan and his split-level home in the suburbs to fish for his soul in the shade of a Rocky Mountain peak. The hero of The Durable Fire undergoes the equivalent of a deathbed conversion before he can regain his faith in the corporate way of life. Both men sing the organizational blues, to wit, Big Business is too...