I had a look through this book the other day when a friend bought it. It is now on my list for crimbo (massive hint to familly)Matching the Hatch: Stillwater, River…
A guide to help the angler choose the right artificial fly, including macro-photography of insect life combined with selections of the most lookalike lure. The book suggests that the angler observes the insect that seems to attract the most, and choose a fly from the photographs supplied.
Its a classic!!!!