This is the time of year your trout enthusiasts begin snooping around to see if there is anything new on the market. Many of them will ask about books on ""flies"". In case you don't know what they mean by a fly, it is the bait used, to, as closely as possible, resemble the actual insect on which the fish are feeding. They are made of feathers and fur and wire and silk and their colors are as fascinating and alluring to me as worm angling is repulsive. This is an excellent book because it is a simple text book on fly tying technique. Starting with the tools the author takes up the question of hackles, materials and the actual tying of special flies. Dry flies for those which float) then wet flies (which sink), nymphs, etc. You'll sell plenty of these.