Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A "Must Have" for Dog Owners

Terri McGinnis' book has served us extremely well through many dog injury and health crises. We live in an extremely remote area and the nearest vet is 125 miles away, but with this book, we have veterinary advice close at hand. Well-written in language the lay person can readily understand. Thanks, Dr. McGinnis!