| Title | : | Top Secret |
| Author | : | |
| ISBN | : | 0763629723 |
| Format | : | Paperback |
| Number of Pages | : | 144 |
The author s upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious SCHOOL LIBRARY JOURNAL starred review Pssst Do you know the difference between a code and a cipher Can you tell a St Cyr slide from a Cardano grille Did you know that the discovery of a substitution cipher caused Mary Queen of Scots to lose her head Don t look now, The author s upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious SCHOOL LIBRARY JOURNAL starred review Pssst Do y...
3.5
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