Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Well spent money

For a beginner or a intermediate user this book is definitely a must have. It contains a lot of useful codes that are commented and easy to understand. For the advanced user there isn't much to get. If you consider the fact that there are 11 authors to this book then the book seems to be a bit thin. I had hoped for much more code. The language can sometimes be a bit confusing: The code analasys is sometimes more difficult to understand than the code itself.