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