Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I can not finish this book!

This book is full of duplicate contents. For instance, you can find the definitions of entity bean and session bean more than ten times and they are almost same contexts. I doubt the author tried to make the book thicker to make more money (It also wastes readers' lot of time, I hate this). After I found the book published by O'reilly, I never touched this book again. Be careful of the thick books!