Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poorly written! Incomplete! Some good useful examples! Unfortunately nothing better up there!

A poorly written book!It appears as if the author chose his chapter headings and section titles well to make it look at first glance like an in depth material covering a broad range of subjects. However, if you read the book you will notice that each section starts with a poor superficial introduction of the subject matter with absolutely no in depth material, followed by a very good example. I must say that most of his examples work, but you will have to scratch your head to know why. He doesn't even comment on his own code other than in a superficial way.I tried to search for a good book on the subject and couldn't after a year of using this one. Being this the only valid source up there, you probably won't have a choice but to get it. It'll get you started, but you will end up having to purchase another book to complete your knowledge.