Book excerpt: An omnibus edition of nine volumes of postwar histories declassified by the National Security Agency in 2010. The research was carried out by the Army Security Agency relying on captured documents and interviews with prisoners. This is an absolutely essential primary reference for anyone interested in cryptography as a vital aspect of World War II. The volumes include: Volume I: Synopsis Volume 2: Notes on German High Level Cryptography and Cryptanalysis Volume 3: The Signal Intelligence Agency of the Supreme Command, Armed Forces Volume 4: The Signal Intelligence Service of the Army High Command Volume 5: The German Air Force Signal Intelligence Service Volume 6: The Foreign Office Cryptanalytic Section Volume 7: Goering's "Research" Bureau Volume 8: Miscellaneous Volume 9: German Traffic Analysis of Russian Communications