How to Write and Decode Secret Messages

How to Write and Decode Secret Messages image
ISBN-10:

0590373862

ISBN-13:

9780590373869

Author(s): MILLER, MARVIN
Released: Jan 01, 1998
Format: Paperback, 200 pages
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Description:

Based on one of the most popular segments in Boy's Life magazine, a collection of codes offers the secret to writing and solving codes, includes a decoder wheel, and presents such challenges as the Pigpen code and the Mixed-up Math Code. Original.












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