How to Keep a Secret: Writing and Talking in Code
This book contains everything a kid needs to have fun making and breaking all kinds of codes and ciphers. With humor and clarity, the authors show how to use everything from Pig Latin to Morse code to invisible writing to mystify such enemy spies as younger siblings. A funny mystery message is mixed In throughout the book, and for those who get stumped, all the answers are in the back.
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9 of Clubs ABCDEFGHIJKLMNOPQRSTUVWXYZ acronym alphabet shift cipher alphabet square backward alphabet cipher backward cipher bottom line Chapter code alphabet code letter code message code words coding devices coding key coding stick coding strip consonant coordinates cipher decoding this message drawer dummy letters easy encode your message fencepost cipher five numbers Fortune Cookie Mystery friends graph paper Here's Invisible Ink invisible writing key name shift key number letter spaces message drops message paper Mirror Writing Morse code number of letters number of places Number Substitution Ciphers o'clock partner will know password Peggy pencil phone number playing card code pressure writing Queen of Hearts secret codes secret language secret message Secret Writing shift forward Spades spycode sure your partner telephone cipher top line transposition cipher Try decoding turn the coding vowel watermark writing word you need words begin Write the alphabet write your code write your message