This book is from a collection of German military books. The title translates “Chronicles of the Naval War, 1939-1945”. The book is written in modern German (not the high German which tends to be harder to read). If you don’t read German, I believe there are apps now that translate languages by bringing up the page on your phone. This book maps day by day movements of the German Navy vessels. Great information for those studying Germany in World War 11. The book is fairly rare here in the US. It was written and published in Germany.