U-boats in the Bay of Biscay

This book demonstrates the development of the discipline of Operational Analysis in the context in which it actually happened - the Allied effort to find and destroy the German U-boats going across the Bay of Biscay on their way to attack Allied shipping in the Atlantic
One aspect that makes the book so interesting is that it not only shows the considerations of the Allied OA people, but also the other side of the coin, gleaned from the diaries of Carl Doenitz, commander of the Nazi U-boat fleet