John Voelker is nearly as important but is encountered less often these days. Best known under his Robert Traver pen name for his 1954 best-selling novel, Anatomy of a Murder, his best trout-fishing book was Trout Madness (192 pp.; 1989 paperback reprint of 1960 first edition. Published by Simon & Schuster, Dept. FS, 1230 Ave. of the Americas, New York, NY 10020. Softcover, $11). Here Voelker dissects the foibles of trout fishing. Chasing trout, he once wrote, is no less wearing and barely less complicated than chasing women.