Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A lot of how, not enough why

This book is not for beginners, and may not be for anybody. It is poorly indexed, making it very difficult to find a desired topic. It is also largely based on step-by-step examples, without enough explanation of why something works the way it does. In other words, plenty of detail on specific, pre-determined tasks, but scant exploration of broad topics and ideas.