Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Simply the WORST !!!

Such a waste of money! This book sucks! There are so many mistakes in it that I sometimes think that Deborah Phillips had barely graduated from high school. The strategies given in the book explain only the tip of the iceberg, they are all common sense. They explain only the basics, which are not enough to get a good TOEFL score. I don't usually write reviews, but for this one - it was a must. In case I didn't make it clear -DON'T BUY THIS BOOK !