Cheap and relatively quick to build, over 700 Type VIIs were produced, making it the most common type of German World War II U-Boat, and the most produced submarine class in history. Armed with five torpedo tubes and smaller than the American fleet boats, this was a formidable enemy vessel, nearly winning the Battle of the Atlantic; however, the cost was devastating, as more than 75 percent of U-boat crewmen were killed. This is the second of a superbly detailed, two-part volume in the Encyclopedia of Warships series describing the development of the Type VII. The boat’s history is supported by technical data and production specifications, along with detailed colour plates which show various views of the whole silhouettes as well as Type VII details. This book is bilingual, with Polish and English text and captions.