instruction:
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.
question:
The Presidential Difference . This book offers insightful, thorough, and well-reasoned analysis of every  modern president, from FDR through Clinton, all in slightly more than 100  pages.  Greenstein concisely but comprehensively reviews all of these  presidents based on various categories -- from charisma to cognitive  abilities to emotional maturity.  Beyond that, he provides a historical  backdrop to each presidency, providing context and texture for each tenure.   This book offered fresh perspectives to most every presidency, and forced  me to reevaluate the Bush and Ford presidencies in particular.  I imagine  most readers will find that Greenstein's book challenges many of their  long-held assumptions too
answer:
POS


question:
excellent reference . Like other reviewers, I agree that a book is no substitute for instruction by a teacher.  Nevertheless, this comes as close (for the Yang style short form) as anything I've found.  Even if you have no interest in the martial aspects of taiji, having the potential applications of the form enriches practice.  I found the illustrations clear.  I own a half dozen or so books on taiji, and this is the only one I regularly consult
answer:
POS


question:
I read this book here in Brazil. . I read this book, translated to the portuguese, here in Brazil.It was writen in nazi Germany(some little parts were writen in Portugal).  How an american thought about III Reich, living in that times?If you read this book, you can see.The best in this book are the parts about daily live in nazi Germany and in France defeated in 1940.
answer:

POS