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"Move over, James Bond! A new spy is in town! After reading this handbook, boys will be able to send messages written in invisible ink, to invent and read secret codes, to construct hiding places for important items, and much more."
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"Move over, James Bond! A new spy is in town! After reading this handbook, boys will be able to send messages written in invisible ink, to invent and read secret codes, to construct hiding places for important items, and much more."