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That book has so much more than Bletchley Park. Buy it for that, and you will be amazed at how much you learn.

Looks like he has written two with that name, or is that just Amazon with two different versions?

The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography

And The Code Book: The Secrets Behind Codebreaking

Guessing the second one has more to do with Bletchley Park

I know the first one covers the Enigma, haven't heard of the second one before.

It looks like the second one is the young adult adaptation of the first one.

Oops, I didn't catch that when I posted. Hard to read small print on a phone. I'll pick up the first one!

The first one is the one I've read and recommend. I haven't seen the second one before.

An excellent and entertaining read! Highly recommended.