MacArthur's ULTRA: Codebreaking and the War against Japan, 1942-1945 (Modern War Studies)
"A superb book that will surely be the prime reference work on the subject for years to come."  --Cryptologia"Belongs in all War II collections."   --Library JournalSubject: Your Amazon.com Order   From: orders@amazon.com "A must for anyone with more than a superficial interest in World War II or military history." --Choice