Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Long on opinion, short on facts

I found this book entertaining in terms of the anecdotes they use to illustrate their points. However, I was deeply disappointed with the degree of conviction they maintain based primarily on a data sample of a little more than 100 firms. That compares to more than 30,000 transactions globally in a normal year. I find it difficult to have much confidence in their conclusions. I find it annoying that author's often seem to promote either their agenda, their firm, or a particular point of view by using either data that tends to support their conclusions or a sample that is too small to be meaningful. Nonetheless, if you are interested in being entertained, this book is for you...howerver, if you are interested in some modicum of rigor, you need to look elsewhere.