A CUNNING CHRONICLE OF THE 50 CODES ALTERED HISTORY FOREVER . . . AND YOUR CHANCE TO SOLVE THEM! Join bestselling author of Bletchley Park Brainteasers and Secret Britain, Sinclair Mckay, in a tantalizing new history of the uncrackable codes, secret cyphers and hidden messages that shaped the world we know today. From the temples of Ancient Greece to the court of Elizabeth I, from antique manuscripts whose codes might hold prophecies of doom to the modern realm of quantum mechanics, you will discover how a few concealed phrases could help win wars, spark revolutions and even change the faces of great nations. Secrets are there to be uncovered, if you have the skills to decrypt them.