Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Interesting new perspectives, but some problems

This book offers a lot of new ideas, and if half of them are true then it is worth reading. But some of the ideas put forth, like for instance trying to relate the cult of Kim Il Sung in post war Korea to the Japanese cult of the emperror when Korea was a colony are a bit of a stretch. Also, the author seems to know much more about Korea, he is okay with Japan, and biased about China, and undestimating its place in the world. It is definitely worth reading but read it critically.