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'We are all proficient cryptoanalysts' writes Paul Lunde, and his entertaining and visually exciting book demonstrates how coded information pervades our lives, whether we are learning to speak or generating keys for digital encryption. This illustrated survey of how codes of every sort have been used to convey information - from early writing systems to cutting edge computing - investigates topics as diverse as the Rosslyn Chapel, Maya symbols and flag signals, cracking Enigma, mapmaking and the genetic code.
