This is a history of combat swimmers from the early 20th Century to the 21st. This essentially tells the story of German, French and Italian combat swimmers. The reader may wonder why the book ignores the US and British contribution to combat swimmer development and use, or why the many other countries who maintain these forces have been omitted. The question is asked and answered unconvincingly in the book. The real answer is that every author has to start somewhere and in this case the German, French and Italian forces were used as the basis of the work. That in no way detracts from a book which is now available in an English edition.