Instruct: Classify Amazon reviews into positive or negative sentiment
Query: don't waste your time and money

I agree with the last reviewer, this book is way out of date and not worth spending the time reading. And I didn't really like the writing style, either, it felt stilted and it was hard to read--didn't flow, if you know what I mean. If you want to really develop your skills, go for something by someone with real credentials who actually knows what they're talking about.