Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Levels on levels on levels

Take your time with this book. I rushed through it the first time and have regretted it. Half of the fun in the book comes from tracking down references and quotes. (It helps to have multi-lingual friends)The type-setting can be difficult at times, but that is a deliberate effect. An excellent first book that is well worth the extra effort that it demands.