Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not helpful in study

I tried hard to work with this book. The only its doubtful advantage is the number of examplas. But what to do with them if there is no any explanations, no any reference formulas etc.?I consider it as a usless book. This is a book for himself, not to help you study the subject. Try SCHAUM Hydraulics...! It is much better even there are less examples.