Instruct: Classify a given review into positive or negative sentiment.
Query: This is an OK book for beginners

If you are just beginning Tai Chi this book is a start but by all means not the authority on the art. There are many books and DVD that will teach you a step-by-step way of doing tai chi. One of the best books on teaching tai chi is "Teaching Tai Chi Effectively" by Dr. Paul Lam. Even if you are a new student to tai chi Dr. Lam's book will help you more than this one.