Howarth, Stephen. "Germany and the Atlantic Sea-War: 1939-1943"
What if: Raeder persuaded Hitler to force Göring to develop a unified maritime strategy against Britain and the Kreigsmarine was also able to deploy faster submarines in 1942.
Summary: Britain is successfully blockaded and is forced to surrender by 1943.
Published: In The Hitler Options: Alternate Decisions of World War II (ed. Kenneth Macksey), q.v.