Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money on this book

This book's supposed survey of the field boils down to little more than some name-dropping of projects, some explanation of vocabulary, and some examples (none really enlightening), with no really useful explanation of how to do anything. It is a perfect example of how some people in the computer industry have perfected consultant-speak: the art of talking impressively and at length about a field without actually saying anything. And to add insult to uselessness, the book wasn't even adequately proof-read for typos.