It's a short step but many years from Marinaro to Field & Stream's Datus Proper, whose** What the Trout Said** is just plain brilliant (286 pp.; 1989 revised second edition. Illustrated. Published by The Lyons Press. Hardcover, $35). Want to get inside a trout's head to find out why it rejects (or takes) your fly? Proper takes you there with wonderful insights. This book will change your thinking and your fishing.