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.

Q: Samson Returns... . In the post-communist world, the Cold War espionage genre may seem a little dated. We have other concerns and fears on our minds now. But for reasons I'll get to below, this novel series is a stand-out from that era, and still well worth reading.    This book was actually written after the fall of communism, but the plot takes place a few years before it. In this book Samson returns to work for London Central and deals with a disastrous assignment in East Germany; an internal struggle to keep positions in a down-sizing agency; etc.  The book plot is interesting enough, but running alongside it are several series-length plots that continue to engross the reader: can Bernard and his wife Fiona rebuild their marriage after her apparent defection and return? In fact, can Fiona even recover from her ordeal? What about Gloria?    I just recently re-read the entire Bernard Samson series (of which this is the seventh out of nine novels). It is one of the best novel series I have ever read, and certainly one of the best espionage genre series ever. There are so many things to like about this series - the in-depth characterizations; the pithy observational asides about people and cultures; the references to multiple languages and their subtleties; the gritty European settings; the hidden plot developments and character motivations that the narrator either can't or won't see; etc.    The author claims that each of these books can be read on their own, and perhaps they could be. But you can get a lot more enjoyment out of it if you start at the beginning with _Berlin Game_ (or even better yet - start with the WWII prequel: _Winter_).

A: POS
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Q: Betrayal of Trust . I received what looked like a nicely preserved used copy.   The book literally fell apart from the binding the first time I read it. It continued to come unglued from the binding each time I attempted to read it.   Not a good quality copy.   Would not purchase from this supplier agai

A: NEG
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Q: An effort not reaching a good result . The book is written with the purpose to be an "up-to-date [source about] DC/DC converters for students and practicing professionals". It is a shame how this target is not reached. Since from the very begin, the introduction, you will face an answer: what is its usefulness? You'll hope that, going on reading, everything will be clearer, and, from a certain point of view, this is what you get: what you've seen in introduction is eventually explained so that it could be useful even to students. However the text neither is "practical" nor gives you the "in-depth-analysis" you were hoping since its title begins with "Advanced". Schematics are rarely useful to understand the following analysis and are often badly sketched/printed. Mathematical derivations are quite good but not enough to fulfill designers needs. Apart from this it is a good effort. In my opinion readers should have to wait the next edition, if there will be a next edition

A:
NEG
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