Items related to How to Write and Decode Secret Messages

How to Write and Decode Secret Messages - Softcover

Miller, Marvin

 
9780590373869: How to Write and Decode Secret Messages

Synopsis

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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