A new book, Action This Day (it was only on Amazon UK), includes chapters written by former Bletchley Park codebreakers. It makes the claim that a woman figured out the key wiring of the Enigma box long before others cracked the code. Her theory was dismissed as too simple. We may never know if she would have been taken more seriously if she was male. Royalties from the book will be donated to the Bletchey Park Trust.