This is one of the more important books - by reputation at least - in fly fishing. It was a critical step in the development of fly fishing, particularly with dry flies during the period right after WWII. At its best, Marinaro presents a fresh take on trout, their etymology, their feeding behavior, and the imitations most likely to 'take fish'. It also provides a nice sense of the middle part of Pennsylvania limestone streams that so much consumed his life. The writing is formal - lawyerly (Marinaro was a tax attorney) and at time quite turgid, unlike the waters he describes.
One welcome reaction: this was not a story of capturing the 'big one' in Patagonia or fishing in the far west up in the Winds, helicopter fishing, if you will. It was about close to home waters, about learning the local streams well and completely, caring for them and living in their presence and the life they maintain. Not a bad thing and all too often lost today.