812443
9780486254050
Fascinating, fun-filled book tells how to write and decipher coded messages. Easy-to-follow directions let even young beginners become experts in backward ciphers, false word division, null ciphers and more. Workbook includes ample space for decoding 68 secret messages. Solutions at end of book.Gleason, Norma is the author of 'Fun With Codes and Ciphers Workbook' with ISBN 9780486254050 and ISBN 0486254054.
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