Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A must have!

As a profesional Medical biller the days and days I spend using this book are unnumbered. The proccess that american medical association goes about displaying current codes is unmatched. I've tried cd's, websight's, and even mail order code providers. Over and over I keep going back to this book and every year they update this book to keep everyone posted! The end result is as a profesional, you have to get this book before going and spending valuable time and money on so called easy code methods!