Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Spread thin, lacking depth

Keith covers a wide range of topics in this book. Unfortunately, the discussion is shallow, and you will find yourself seeking additional resources for all of the topics covered in the book. If you are looking for a high level overview of the technologies involved because you are new to web services, this book is for you. But if you are looking to fully understand the architectural and implementation details for the core web services technologies, be prepared to buy some more books.