Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dense and compact - a must to read

The book is far from being "light", the quality of the ideas presented commands much thought. It is not a book for a Sunday afternoon read and must be tackled with a rather serious attitude. However, the concentration required is worth spent because as you conclude, there will be something different about how you perceive life. Extremely thought-provoking, it does us all a favour, compelling us to reconsider our views and to think about thinking