What causes s salmon, which does not feed in fresh water, to take a fly-fisher's lure made of feathers, hair and tinsel? This perennial mystery lies at the heart of flyfishing for salmon. In this important new book Francis Grant brings to bear his training as a marine biologist and his great experience as a consistently successful catcher of salmon on a fly. He places particular emphasis on the effective presentation of the fly, so that it will appear at its most attractive to the fish. The temperature of the water and of the air, the speed of the current, and the individual characteristics of each pool all dictate the flyfisher's approach. A controversial thesis of the author is that a wide range of fly patterns is unnecessary. Size, depth and speed of fly presentation are shown to be the critical factors.