This is a guide to what makes a successful trout-fly, with details of 180 of the most successful trout and grayling flies from 18 different countries. 30 of the world's best-known fishers and fly-tyers, including Schweibert, Whitlock, Martin and Harrop, have each selected their six most successful patterns - those they would keep if all others were lost. The book reveals why each pattern deserves to be chosen, and sometimes including the evolution of the fly's design. Advice on why and when to fish each pattern, and full tying instructions, are also given. The author's other books include The New Illustrated Dictionary of Trout Flies and The Grayling Angler.