Instruct: Classify Amazon reviews into positive or negative sentiment
Query: there are many better books...

I was very disapointed from this book. Too much time is wasted in useless exercises, and not enough inspiration is given. I was lucky enough to order a few writing aids books from Amazon so I could easily compare. This is the worse by far. Dont waste your time, look elsewhere unless you have too much free time and want to waste it in useless exercises which could be effective if given in a classroom, not on your own.