Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Aurora Slot Cars

Do not buy this book to "valuate" your cars. This book is all about the history of Aurora. If you are interested in the company, the men, the circumstances, then buy this book. As far as I know it's the only book of its kind and there in lies the value. A great product (T-jets), a unique company (Aurora), an interesting history and well told. I love this book and it's worth every penny.