Every fisherman needs some good knots, so here they are: Practical Fishing Knots by Mark Sosin and Lefty Kreh (144 pp.; 1991. Illustrated. Published by The Lyons Press, Dept. FS, 123 W. 18th St., New York, NY 10011. Softcover, $10.95). It's clear, concise, inexpensive, and easy to use. What more could you want?