bobins wrote:
Do the light coloured letters on the cover constitute a (perhaps undisclosed) puzzle as well ?

Knowing how subtle a lot of the puzzles are inside I'd not be at all surprised....
That book is so addictive... I expect rehabilitation centres to spring up soon to treat those who have become so addicted their normal lives have been seriously disrupted...
I'm also reading this at the moment. Possibly one of the best technical books on the breaking of the Lorenz SZ40/42 Geheimschreiber (Secret Writer) cypher machine...
It goes into deep technical detail of how the machine was broken and how Colossus worked to help the decryption process...
