Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Serious Must for Serious Dog People

First published in 1995, nothing else as comprehensive and as carefully researched on canine behavior and development has been published. For the general reader, the writing style may be a bit dry; however, because each chapter has different authors, the writing style, while basically academic and fact driven, varies.Any serious dog breeders, trainers, or owners will find themselves returning to certain chapters over and over again. Breeders and even new puppy owners would benefit from the chapter by Serpell and Jagoe on "Early experience and the development of behaviour," which updates the standard beliefs about puppy development resulting from the Bar Harbor experiments of over 50 years ago.Excellent book!