Author: NESBIT, ROY CONYERS.
Title: Ultra Versus U-Boats Enigma Decrypt in the National Archives.
Description: 4to; pp. viii, 248; numerous b/w photograph illustrations throughout; bibliography, index of U-Boats, original cloth; a fine copy. (Great Britain), Pen & Sword MILITARY, (2008). Keeping the Atlantic sea-lanes open was a vital factor in the fight against Nazi Germany. But there is one crucial element in this prolonged campaign that has still not been fully appreciated the role of code-breaking, in particular the decryption of secret signals transmitted by German Enigma machines. And this is the focus of the authors fascinating new account of The Battle of the Atlantic.

Keywords: gmil General military history WW2 Second World War Enigma machines decryption battle of the Atlantic