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Most Helpful Customer Reviews
5.0 out of 5 stars
ODHU/NTINGGO!,
By TulsaTV (Tulsa, Oklahoma) - See all my reviews
This review is from: Codes and secret writing. (Paperback)
My copy of this delightful little book is tattered but still in my possession. It cost 25 cents when I acquired it in the early 1960s. Zim takes the reader through a little history, substitution ciphers, position codes, code wheels, an intro to code breaking and secret writing, including invisible ink. I remember the thrill of learning about these topics.
Code wheels had previously been introduced to me by Clutch Cargo. More about Clutch's introduction to the Tulsa TV market and his Adventure Club at TulsaTVMemories.com.
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