Instruct: Classify a given review as either positive or negative.
Query: This book is biased garbage.

I am not a chiropractor. However, I am a pharmacist. Please save your money and use it to feed the poor. Don't waste it on such biased material. I felt this book was nothing more than anti-chiropractic propaganda. This book has nothing but vindictive tones and wild conclusions. Barrett and his associates seem to know nothing about their topic and blindly write like raving lunatics (no matter how many so-called "references" they have). Their style and language seem to be equivalent to National Enquirer type writing. You would have more fun reading Webster's dictionary from cover to cover.