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Title: Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More, Author: David J. Peterson
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Create Your Own Secret…
by David J. Peterson, Ryan Goldsberry (Illustrator), Odd Dot
Paperback $12.99
Title: Perplexing Puzzles and Tantalizing Teasers, Author: Martin Gardner
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Perplexing Puzzles and…
by Martin Gardner
Explore Series
Paperback $12.95
Title: Double Cross: Deception Techniques in War, Author: Paul B. Janeczko
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Double Cross: Deception…
by Paul B. Janeczko
Hardcover $16.99