From the back cover:

The scourge of Allied shipping during World War II, the U-Boot Waffe was one of the most feared components of Hitler's war machine, yet the Kriegsmarine was the least political branch of the Third Reich. The sailors of the U-boat arm were courageous, highly skilled seamen, who fought a war in the toughest conditions: subject to immense tension, and forced to cope with the challenges of the Atlantic, life for a U-boat recruit was far from easy. This title explores the life of a typical U-boat crewman, from recruitment, through training and service conditions, to combat experience throughout the war. Illustrated with many previously unpublished images, this book offers a fresh insight into the experiences of the men in Dönitz's legendary 'wolf packs'.