This was a fantastic book. Very well written and covered a broad history of codes and cryptography, and also well suited to a lay-audience, as it included worked examples. I found the beginning few chapters a little slow and drier than the rest of the book, and thoroughly enjoyed the chapters on lost languages like ancient Egyptian and the Linear B tablets. The last chapter about the future of cryptography, looking at quantum computing was interesting but hard to imagine how it would work in practice. I liked the inclusion of a competition at the end of the book.
Overall, I thoroughly enjoyed the book and would highly recommend it to anyone interested in cryptography, secret codes and also anyone interested in computer security.
