Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Suprisingly Helpful!

Mr. Kelley has done a wonderful job imparting his wisdom and expertise into this book. I found it very helpful teaching my son and daughter tennis. The book provided drills and techniques for the begining tennis player. The book also provided helpful hints which carry over into other sports as well. Thank You Mr. Kelley for this book which has made teaching tennis easier and more enjoyable.