Hitler's Grand Admiral, Karl Doenitz, once boasted that with 300 submarines he could dominate the seas and starve England into surrender. For a time, it seemed that the Grossadmiral was entirely correct. Until the middle of 1943, the Atlantic sea lanes were alitter with the wreckage of American and British cargo ships, and logistically (as well as militarily) England was facing her darkest hour. Then, quite suddenly and unexpectedly, the tide turned, and, within a few months, the Allied escort forces had reversed the trend--by the relatively simple expedient of fighting back. The subtitle of this book, ""Critical Months in the Battle of the Atlantic as seen from the Conning Tower and the Bridge""--gives accurately the theme as well as the flavor of the work. Bloody Winter is the story of those months in which the Atlantic U-Boat Fleet of Germany was dealt a blow from which it was never to recover. It is a sailor's story (the author is a Captain in the U.S. Coast Guard), conveying the excitement of torpedoings, the tragedy of loss, the exhilaration of rescue, and the satisfaction of eventual victory with an attention to detail that may be lost on the non-nautically inclined but that will delight the naval-history buff and awaken sleeping seadogs. It is a wholly creditable popular job, cast in a competent-amateur sort of style which almost overrides the inevitable sameness of many of the confrontations described.