Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book rates 10 stars, year after year

If you are going to buy only one price guide on antiques, buy this one...and buy a new one every year. I use this constantly ~ it is well written, well documented and has numerous references. It covers a daunting array of items thoroughly and interestingly. The background information at the beginning of each heading is worth the price of admission alone.