Much faster read than I was expecting given the subject matter - I finished in a day and a half. Good overview of the history of the Korean peninsula and the North/South divide, which I knew nothing about. Lots of details about how a populace eases into a totalitarian government, a famine, isolation. Interesting and a cautionary tale. (Of course there's plenty of selection bias here as the author could only interview defectors.) 
 Highly recommended.