by EileenO'Brien (Author), D . Riddell (Author)
The Usborne Book of Secret Codes features al l kinds of codes and secret writing to learn, gadgets that y oung readers can make for coding and decoding messages and h ints on how to pass top secret information without it being intercepted '
Format: Hardcover
Pages: 32
Publisher: Usborne Publishing Ltd
Published: 30 Jun 1997
ISBN 10: 0746023308
ISBN 13: 9780746023303
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