Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good naval history

A very enjoyable book for any World War II naval fan. The author did extensive research using German sources to describe part of World War II that few knew about. The most interesting part of the book was not the extensive German organization, no surprise there, but the complete lack of organization on the American side. The U.S. was extremely slow in adopting to meet the threat. The Navy was battleship based. Admirals and Captains wanted large sea battles with other battleships, not hide and seek anti-submarine warfare. As a result, they were unprepared to defend the East Coast from submarine attack. It was amazing the Germans did not do more damage than they did. Check this book out.