Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DO NOT BUY THIS BOOK

I really regret not checking the Amazon reviews before buying this book. To date I have counted over 13 typos, most of them occuring in the Math section. Plus signs are printed as minus signs, graphs are missing captions, and even some of the answer charts are misprinted. There is no excuse for such carelessness in a book whose entire purpose is the make you aware of details. The only redeeming value of this book is it keeps you on your toes!