Ciphers.
Code of honor
Alan Gratz
The Code Book
Simon Singh
Origin
Dan Brown
Codes, ciphers, and secret writing
Martin Gardner
The sword thief
Peter Lerangis
The Mona Mousa Code
Elisabetta Dami
Voynich Manuscript
M. E. D'Imperio
One False Note
Gordon Korman
Codes and ciphers
Laffin, John.
Cryptanalysis
Helen Fouché Gaines
Storm Warning (The 39 Clues, #9)
Linda Sue Park
The Code Book
Simon Singh
Codes and ciphers.
A. D'Agapeyeff
The Mysterious Code
Kathryn Kenny
The Vipers Nest
Peter Lerangis
Top secret
Paul B. Janeczko
The Hut Six story
Gordon Welchman
Cracking Codes and Cryptograms for Dummies
Denise Sutherland
The secret three.
Mildred Myrick
Alistair MacLean's Code breaker.
Alastair MacNeill
The Viper's Nest
Peter Lerangis
Codebreaker
Stephen Pincock
The Riverbank publications
William F. Friedman
Codes & ciphers
David J. Bodycombe
How to keep a secret
Elizabeth James
Secret & Urgent
Fletcher Pratt
Trust No One (The 39 Clues: Cahills vs. Vespers, #5)
Linda Sue Park
Morse Code (Communication)
Karen Price Hossell
Alvin's Secret Code
Clifford B. Hicks
Into the Gauntlet (The 39 Clues, #10)
Margaret Peterson Haddix
The 39 Clues: Mission Titanic
Jude Watson
Codes
Kjartan Poskitt
Mathematical recreations and essays.
W. W. Rouse Ball
Cryptonomicon
Neal Stephenson
Cryptanalysis of the Hagelin cryptograph
Wayne G. Barker
Codemaster #2
Marvin Miller
Elementary cryptanalysis
Abraham Sinkov
Cahills vs. Vespers
David Baldacci
The codebreakers
David Kahn
Digital Fortress
Dan Brown
