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 '
- ISBN10 0746023308
- ISBN13 9780746023303
- Publish Date 30 June 1997
- Publish Status Out of Print
- Out of Print 28 June 2001
- Publish Country GB
- Imprint Usborne Publishing Ltd
- Format Hardcover
- Pages 32
- Language English