Killing Ground — Douglas Reeman

Tasked to protect the vital, threatened Merchant Navy convoys in the Western Approaches, Howard finds himself in the middle of the Battle of the Atlantic -- a full-scale war that was a relentless, savage battle against an ever-present enemy and a violent sea in an arena known to embittered survivors simply as the killing ground. This fictionalized account of the Battle of the Atlantic, which spanned nearly six years and was the longest military campaign of World War II, is seen through both British and German eyes and deals with the extreme perils of war at sea and stands as an excellent study in leadership with characters that ring true.