Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: The "Weightlifting Encyclopedia" is a powerful book!

It was obvious from the minute I picked up this book, that it was written by someone who had a true love of the sport of weightlifting. As a competitve weightlifter and instructor at New York Unversity who specializes in the area of resistance training I have had the opportunity to reveiw literally hundreds of weight training texts. Mr Dreschler's book is by far the most complete weight training text on the market today. The book covers every component of weightlifting and is unprecedented in its detailed explanation of each olympic lift. The author also does an excellent job in breaking down each exercise and is able to convey difficult physiological and biomechanical concepts for everyone to understand. The book is quite extensive and is a true reference text for anyone interested in strength training. I can not wait for the video!