Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Most Comprehensive

This book is well worth reading and is truly breed specific,unlike a few of the other books available which are merely generic puppy pamphlets with a few specific breed pictures thrown in. Worse yet,they dedicate much of the space to filler material such as thinly cloaked advertisements for certain dog products. This book keeps clear from all of this and is 100% pure beef!! I wouldn't feed my pup filler material;why should you pay for and read "sawdust"?