Explains how to use secret codes, including Morse, Caesar's, Sandwich, Rosicrucian, and others, as well as how to send hidden messages using invisible ink, how to take fingerprints, and other tricks and techniques.

Dozens of codes and hidden messages are presented as riddles, poems and other fun-filled expressions.

This illustrated encyclopedia surveys the history and development of code-making and code-breaking in all areas of culture and society from hieroglyphs and runes to DNA, the Zodiac Killer, graffiti, and beyond.

A collection of four all-new strange stories from the sleepy town of Gravity Falls in one original graphic novel. Written by Alex Hirsch. Illustrated by Asaf Hanuka, Dana Terrace, Ian Worrel, Jacob Chabot, Jim Campbell, Joe Pitt, Kyle Smeallie, Meredith Gran, Mike Holmes, Priscilla Tang, Serina Hernandez, Stephanie Ramirez, and Valerie Halla.

Explains how different ciphers work, why they were invented, and how they were cracked, covering codes ranging from ancient Egyptian hieroglyphs and World War II's Enigma machines to the samurai code of honor.

Here's a book that will turn any young reader into a super sleuth capable of breaking some of the world's toughest codes. Children learn how codes work, along with special tricks for deciphering coded messages, and use these codes to send notes or to share information that is strictly classified between friends. With a fun-filled array of secret jokes, riddles, and poems, plus a variety of popular and new codes, this entertaining book will give readers pages of puzzling pleasure.

Dozens of codes and hidden messages are presented as riddles, poems, and other fun-filled expressions.