In this task, you are given books product reviews in English language. The goal is to classify the review as "POS" if the overall sentiment of the review is positive or as "NEG" if the overall sentiment of the review is negative.

Let me give you an example: Hopeful for those who seek harmony in the world . I wouldn't recommend this to anyone who thinks that religious wars, repression of individual spirits or rape of the earth are good things. Those who seek peace, harmony, celebration of each of us and respect for our earth will find this hopeful
The answer to this example can be: POS
Here is why: The overall sentiment of the review is positive as the reviewer mentions positive expressions such as 'hopeful', 'will find this helpful' etc.. Hence, the label is 'POS'.

OK. solve this:
Excellent Instruction for Insight Meditation . Insight (Mindfulness) Meditation - the Vipassana Meditation of Theravada Buddhism - can change your life whether you are Buddhist or not, and this is one of three books that can take you there. To get acquainted with this excellent meditation method and for lots of inspiration to try it, start with "Wherever You Go, There You Are" by Jon Kabat-Zinn. Then, to learn more about just how to do it, move on to "Mindfulness in Plain English" by Henepola Gunaratana. Now you're ready for the Big Leagues of Mindfulness - Larry Rosenberg's outstanding book, "Breath by Breath: the Liberating Practice of Insight Meditation". He takes the potentially complex topic of how to do this meditation just as the Buddha taught it, and explains the entire Anapanasati (Mindfulness with Breathing) method in a way that Westerners can understand and relate to. I've practiced Insight Meditation for more than a decade, and have accumulated a pretty good library of books on Buddhism and on Meditation. Larry Rosenberg's book - which I've read and re-appreciated several times - is one of the last ones I'd be willing to part with
Answer:
POS