Features
- Cover Type: Paperback with 71 pages
- Published by: Dover Publications June 1997
- Written in: English
- ISBN 10 Number: 0486291464
- ISBN 13 Number: 978-0486291468
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Book Dimensions:
11.2 x 8.5 x 0.2 inches
- Weighs: 8.8 ounces
Reader Reviews
I bought it with a bunch of other books about cryptography (serious ones), but it is written for kids. One of the codes is a sentence with the words written backwards. Another is letters split up into blocks, but you can still just read the words straight across. It's really not helpful.
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