This text presents a collection of cryptograms & other enciphered challenges to satisfy various levels of puzzle aficionado. It features over 600 puzzles, from the simple substitution-code type - where each letter stands for another - to difficult ciphers using actual wartime methods employed by historic figures.

About the Author

Elonka Dunin is an award-winning cryptographer and game developer, who broke the PhreakNIC Code and is the internationally recognized expert on the ciphers of the CIA's Kryptos sculpture. She is a founding member of the International Game Developers Association's Online Games Group.

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