Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book stinks...

The book is poorly presented and organized. The author keeps refering to other chapters or references to make his point. Out of the 20 chapters, there are less than 10 examples. Most of the them are unclear, lengthy, and unreproducible. The CD-ROM is useless, except for those demo programs. The writing is highly abstract. The author seems to assume the readers can read his mind. It is not worth ... Users may be better off to get help from the HOWTO topics....