Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Playing pool is one of my interests.

I retired in 2006 and about a year later I purchased a pool table for recreation. In November of 2009 I decided that I wanted to become a better pool player and on the suggestion of my brother-in-law I purchased the book The 99 Critical Shots in Pool.That book moved me along but I kind of hit a brick wall within a year. A friend recommended Precision Pool and I've very thankful that I purchased this book. The information in this book is similar to the information in the other book but the explanations are superior. This is a book I can use to develop my skills. Within days, I was already playing a better game.I'm probably nuts to recommend this book because someone I play against may read the review and use the information in the book against me but I'll risk that. Good competition is hard to find.