JägAir - Codes & Ciphers

Three Enigma Cipher Machines
(Left to Right)

• M-Model Kriegsmarine Four-Rotor Enigma
• A-Model Army Three-Rotor Enigma
• K-Model Commercial Three-Rotor Enigma
  with Rotatable Reflector and Auxiliary Lamp Board

---

Here is a list of interesting books on the Enigma Cipher Machine. By far the best and most accurate is "The Hut Six Story." Many of the other British accounts do not give enough credit to the Polish work done before the War. This work is the foundation on which all the Bletchley Park success is based.

Bibliography
• The Hut Six Story Breaking the Enigma Codes - Gordon Welchman
• Enigma - Wladyslaw Kozaczuk
• Ultra Goes To War - Ronald Lewin
• Station X The Codebreakers of Bletchley Park - Michael Smith