Secret Codes And Hidden Messages
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| Google books | books.google.com |
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| Originally published | 1997 |
| Authors | Jeffrey A O'Hare |
| Date of Reg. | |
| Date of Upd. | |
| ID | 1953037 |
About Secret Codes And Hidden Messages
Here's a book that will turn any young reader into a super sleuth capable of breaking some of the world's toughest codes. Children learn how codes work, along with special tricks for deciphering coded messages, and use these codes to send notes or to share information that is strictly classified between friends. . . .