"A interesting, demanding book." ― A.L.A. Booklist
Learn to take advantage of crucial codes and strategies of mystery verbal exchange in use in view that precedent days. Cipher and decipher codes utilized by spies. discover the recognized codes that modified the destiny of countries and political leaders. and revel in hours of enjoyable experimenting with cryptography ― the technological know-how of mystery writing.
Beginning with easy letter substitutions and transposition ciphers, world-famous technology author Martin Gardner explains how you can holiday advanced polyalphabetical ciphers and codes labored with grids, squares, triangles, and charts. you will research codes which are keyed to typewriters and mobilephone dials . . . even codes that use cards, knots, and swizzle sticks. scan with invisible writing ― inks that glow in black gentle and switch pink below warmth ― and discover the chances of sending messages via outer area to unknown worlds.
Using this e-book, you could resolve the traditionally recognized Playfair Cipher utilized by Australia in global conflict II, the Pigpen Cipher utilized by accomplice infantrymen in the course of the Civil battle, Thomas Jefferson's Wheel Cipher, the Beaufort process utilized by the British Royal military, codes devised by means of authors for heroes in literature ― Sherlock Holmes, Captain Kidd, and the Shadow. and you'll take pleasure in experimenting with weird and wonderful equipment of message sending ― the Dot Code, Knot Code, Swizzle Code, and extra.
Young cryptanalysts, cipher fanatics, and puzzlists of every age will locate hours of intrigue and problem in Codes, Ciphers and mystery Writing.

"A stimulating needs to for the intermediate cryptographer." ― The Kirkus Reviews