Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst textbook. Please don't choose the course if this is the required text.

This book basically gives no proper examples and solutions. If at all there are examples, they don't show the steps in between. The problem is given and there are 2 or 3 intermediate steps and then he gives the answer to the problem, but the problem might be having around 10 or 12 intermediate steps. I din't find this book helpful at all.