This study is based on scrutiny of all available photos, including many newly discovered, collated with the first-hand testimony of Kriegsmarine survivors. After decades of study, the authors are the world’s leading experts. Their work challenges many accepted views, while greatly expanding the general understanding of the subject. The book contains 300 color illustrations and covers all major surviving ships down to destroyers from 1942 to the end of the war. While there can never be a last word on such an elusive and poorly documented subject, these two volumes will be regarded as the most authoritative work in the field for many years to come.