Instruct: Classify an Amazon review into positive or negative sentiment.
Query: a great work made better

Aubrey Burl's previous works were showing a wee bit of dating. As carbon dating become more accurate, you are seeing these ancient rings grow older in age instead of younger as they anticipated. While Burl's previous works were amazing, this long awaited "update" of this information, as well as addition information on more recent excavations make this is must. Yes, it expensive. But it's worth every penny. There are new insight in the the purpose of the rings of stone, a new interpretation of Calanais (sorry, as a Scot I refuse to call it Callanish!) and StonehengeThe beautiful book is loaded with hundreds of photos, explores the ancestry, methods of construction and why they were abandoned after thousands of years of use.Marvelous work made even better by bringing the information up to date.