Cripples and spinners are often the most important portions of a trouts diet that is actively feeding on the surface, yet they are often the most neglected by the fishermen. Learning more about what and why trout feed on these types of insects, often to the point of refusing healthy insects, is critical to becoming a more complete and successful angler. This was the first book to address this back in 2001 and has become an indispensable resource for tyers and dry fly enthusiasts alike.