I Spy Treasure Hunt: A Book...
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Bomb
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I Spy a Dinosaur's Eye ...
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Spies in the American...
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101 Spot the Differences
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Curious Cases: True Crime for...
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Secret Code Games for Clever...
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Unbreakable: The Spies Who...
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Bomb: The Race to Build--And...
Steve Sheinkin
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Spies, Soldiers, Couriers, &...
K M Waldvogel
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Spies in the Civil War for...
Daniel Lewer
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Nathan Hale: America's First...
Aaron Derr,
Tami Wicinas (Illustrator)
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Top Secret: Spies, Codes,...
Crispin Boyer
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The Top Secret Spy Puzzle...
Amerigo Pinelli (Illustrator),
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Mary Bowser and the Civil War...
Enigma Alberti,
Tony Cliff (Illustrator)
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The Pocket Guide to Spy Stuff
Bart King,
Russ Miller (Illustrator)
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Spy Gadgets
Scholastic
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Mary Bowser and the Civil War...
Enigma Alberti,
Tony Cliff (Illustrator)
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Cryptography for Kids: So you...
Jennifer Brady
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Spy Mazes
Sam Smith,
Various (Illustrator)
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Navajo Code Talkers
Stuart A Kallen
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Valentines Day Gifts for Kids...
Ali Lizzy
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The Daring Spy Adventures of...
Christina Leaf
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Nazi Saboteurs: Hitler's...
Samantha Seiple
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