Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Difficult reading, lots of information

IMHO A lot of information. Not for casual reading, I found this book difficult reading. It seems to be written in a complicated fashion on purpose. In many cases the author could say the same thing with 60% of the words. I don't advocate books should be written at a 5th grade level, but this would be a much more enjoyable read if it wasn't so much work.