In NUMBER@1 , PERSON@1 published a book of NUMBER@2 exercises in classical cryptography , which was published in the LOCATION@1 as The Mammoth Book of Secret Codes and Cryptograms , and in the LOCATION@2 as The Mammoth Book of Secret Code Puzzles .

In NUMBER@1 , she wrote a book with hundreds of puzzles in it , called The Mammoth Book of Secret Codes and Cryptograms .
