Books with title Codes and secret writing.

A fascinating, challenging book." — Review by A. L. A. Booklist. Experiment with cryptography — the science of secret writing. Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks...even invisible writing and sending messages through outer space. Hours of intrigue and challenge. 45 diagrams

Secret Word Puzzle BookDo your kids love solving puzzles and earning fun rewards through learning?Get ready for an incredibly fun and exciting learning adventure with our puzzle-solving book for kids! This Secret Word Puzzle Book is a puzzle-solving book that contains 22 unique and thrilling puzzles that helps teach your child necessary spelling as well as symbol coding, an essential skill that used for IQ testing in young children.With each puzzle your kids solve in our kids’ puzzle-solving book, they receive coordinates that lead the main character Sota around a map, guiding him towards his lost sister. Every time they solve a puzzle, they’re not only getting one step closer to finding a hidden portal.Once your little one reaches the end of our kid’s puzzle book and puts all of their coordinates together to find the hidden portal, they’ll find their prize of a free e-book download. This e-book provides them with more thrilling learning opportunities just like this puzzle book for kids!Need more reasons to choose our Secret Word Puzzle Book! The prize at the end of our puzzle-solving book for kids helps keep them engaged through all 22 puzzles The contents of our kids’ puzzle book are presented in full-colour, adding to the excitement Our kids’ puzzle-solving book makes a great birthday or back to school gift for young children Get your kids excited to learn with a real piece of treasure at the end with our Puzzle Book for Kids!

Secret Word Puzzle BookDo your kids love solving puzzles and earning fun rewards through learning?Get ready for an incredibly fun and exciting learning adventure with our puzzle-solving book for kids! This Secret Word Puzzle Book is a puzzle-solving book that contains 23 unique and thrilling puzzles that helps teach your child necessary spelling as well as symbol coding, an essential skill that used for IQ testing in young children.With each puzzle your kids solve in our kids’ puzzle-solving book, they receive coordinates that lead the main character Sota around a map, guiding him towards his lost sister. Every time they solve a puzzle, they’re not only getting one step closer to finding a hidden portal.Once your little one reaches the end of our kid’s puzzle book and puts all of their coordinates together to find the hidden portal, they’ll find their prize of a free e-book download. This e-book provides them with more thrilling learning opportunities just like this puzzle book for kids!Need more reasons to choose our Secret Word Puzzle Book! The prize at the end of our puzzle-solving book for kids helps keep them engaged through all 23 puzzles The contents of our kids’ puzzle book are presented in full-colour, adding to the excitement Our kids’ puzzle-solving book makes a great birthday or back to school gift for young children Get your kids excited to learn with a real piece of treasure at the end with our Puzzle Book for Kids!