Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not sure how this becomes popular

First off I will admit, I have not actually gone through this book when I bought it a few years ago. I find it hard to want to read a book from someone who can't even take the time to edit and fix basic grammar and even include a section dismissing the critics of his style. I think the first step to credibility should be to meet or exceed the education level of the audience you are writing to. In this case, college graduates and professionals. If I give up on the book within the first couple pages because you can't do that, then you didn't do your job.I don't know how this book continues to be popular. I personally think it gets recommended a lot but very few people actually read it because of this concern. But then again it might actually have useful information in it. I'm just going stick with authors that care enough to edit their work. If you don't care enough to write well, I'm not going care to read it.