Publisher's Synopsis
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering coded messages.
How to Write Codes and Send Secret Messages
Library Binding
Hardback
Not available for sale
Includes delivery to the United States
Out of stock
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Book information
| ISBN: | 9780590070560 |
| Publisher: | Atheneum |
| Imprint: | Atheneum |
| Edition: | Library Binding |
| Language: | English |
| Number of pages: | 64 |
| Weight: | -1g |
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