Unsolved!: The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret SocietiesE-bookUnsolved!: The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret SocietiesdiCraig P. BauerValutazione: 4 su 5 stelle4/5Salva Unsolved!: The History and Mystery of the World's Greatest Ciphers from Ancient Egypt to Online Secret Societies per dopo