| Enigmas Set |
| by David Boyle |
| Find out more: $0.99 @ AMAZON |
| During the First World War, a British code-cracking team paved the way for the successful code-breaking of the Second world War. Many of those most closely involved in cracking the Enigma code—Alistair Denniston, Frank Birch, Dilly Knox—had wrestled with German naval codes for most of the First World War. |

