I love to fish. The thrill of getting a fish on is like none other. I picked this book up accidentally, so to speak, from my local sporting goods store for the sole purpose of learning how to filet a fish. The clerk said "try this one"( Meaning Timothy's book). So my next salmon fishing trip, I learned how to filet. great easy method. Then I started reading more and found that this guy really knows how to catch fish. I was really amazed at the scientific approach to weather conditions, temperature, how to read the river and presentation or " offering" to the fish. A total wealth of excellent information. Great book.