Instruct: Classify an Amazon review into positive or negative sentiment.
Query: be careful which copy you buy

Do not buy the copy of this book with ISBN 978-1452841212 !!! You have been warned! The equations which are set out as images (ie any that require more than simple typesetting) have not been printed, and the text just shows the file name instead eg. eq1.gif. I can't believe that they're selling this book! The other copies are ok from what I have seen on the preview pages.