Although the story of the German naval code breaker in World War 2 is less known than that of the British code breakers at Bletchley Park, their role was undoubtedly significant in the course of the conflict. In German Naval Code Breakers, noted naval historian Jak P. Mallmann Showell, one of Britain’s foremost experts on the subject of the U-boat campaign during World War 2, has delved into the archives o produce an account of the wartime German naval code breakers. The book looks in detail how German code-breaking developing after the traumas of defeat in 1918, the variety of codes used by the British and Allied navies during World War 2, and how German naval code-breaking department involved in the gathering of naval intelligence. In particular, the book gives an account of some of the successes and failures of German code-breaking activities and hoe these impacted upon naval operations in European waters. Amongst topics examined are the role of the code breakers on major engagements of the war such as D-Day and the Battle of the Atlantic.