Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Couldnt put it down!

I had never read too much about the Cold War, especially submarines. This book was recommended by a guy who used to keep track of Russian subs off of the California coast. I was delighted by the stories as soon as I started the book, and could not put it down. I enjoyed the 'thinking out of the box' ideas that were put into play, and the harrowing execution of them in the field. Since im no buff of Cold War details, I assume the stories were accurate. I very much enjoyed the book either way, and have recommended it to several others.