Libri di ciphers
33 libri in questo genere
Operation Trinity
Clifford Riley
The hunt for the missing spy
Penny Warner
Maguire's code of ciphers
Charles H. J. Maguire
The Beale treasure
Peter Viemeister
Codemaster
Hamilton Nickels
Uncracked Codes and Cyphers
Ann Byers
The Mathematics of Secrets
Joshua Holden
Codes and ciphers
Way, Peter.
The chaos code
Justin Richards
Cryptology
Albrecht Beutelspacher
Codes, Ciphers, Secrets and Cryptic Communication
Fred B. Wrixon
Hieroglyphs for fun
Henry Joseph Scott
Ciphers and codes
Karen Price Hossell
Cryptology yesterday, today, and tomorrow
Cipher A. Deavours
Military Cryptanalysis, Part IV
William F. Friedman
Ciphers for the little folks
Dorothy Crain
The secret of the skeleton key
Penny Warner
The 39 Clues
Jude Watson
Top secret
Owen, David
The Mystery of the Hobo's Message
Elspeth Campbell Murphy