Instruct: Classify the given review as either positive or negative.
Query: Excellent, definitive reference work for Rosenthal!

Kerr's book on Rosenthal is an absolute must-have for those whocollect and/or buy and sell Rosenthal. It is jammed full of deliciouspictures showing numerous items in all the categories Rosenthal makes. She includes a pricing guide which is reasonably accurate, even with the advent of online auctions. Don't pass this marvelous book by, it's well worth the price!