Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I feel I've been cheated

With only 16 lines per page and 120 pages (+introduction etc) this thing should really be an article, not a book. Since there are not much text, of couse the book reads fast, but you don't get much information either. The amount of useful information you get (as opposed to a lot of common knowlengde) would probably have fitted into three normal letter-sized pages. This boils down to: I think the author had a few tricks he would write a book on, then he added a lot of common knowlendge, and then enlarged the font to get a book. My opinion: Not at all worth the money, I feel I've been cheated. I've never been so disappointed after receiving a book.