The product is a hardback book titled "Nymph Fishing in Practice" by Oliver Kite, published by Swan Hill in 2001. The book presents a practical guide to the sport of nymph fishing, with insights and tips provided by the author. With a focus on the technique and strategies involved in this specific form of fishing, this non-fiction book is written in English and is a valuable resource for fishing enthusiasts looking to improve their skills in the sport.