{"product_id":"codes-ciphers-and-secret-writing-martin-gardner-9780486247618","title":"Codes, Ciphers and Secret Writing","description":"\"A fascinating, challenging book.\" ― \u003ci\u003eA.L.A. Booklist\u003cbr\u003e\u003c\/i\u003eLearn to use the most important codes and methods of secret communication in use since ancient times. Cipher and decipher codes used by spies. Explore the famous codes that changed the fate of nations and political leaders. And enjoy hours of fun experimenting with cryptography ― the science of secret writing. \u003cbr\u003eBeginning with simple letter substitutions and transposition ciphers, world-famous science writer Martin Gardner explains how to break complicated polyalphabetical ciphers and codes worked with grids, squares, triangles, and charts. You'll learn codes that are keyed to typewriters and telephone dials . . . even codes that use playing cards, knots, and swizzle sticks. Experiment with invisible writing ― inks that glow in black light and turn red under heat ― and explore the possibilities of sending messages through outer space to unknown worlds. \u003cbr\u003eUsing this book, you can solve the historically famous Playfair Cipher used by Australia in World War II, the Pigpen Cipher used by Confederate soldiers during the Civil War, Thomas Jefferson's Wheel Cipher, the Beaufort system used by the British Royal Navy, codes devised by authors for heroes in literature ― Sherlock Holmes, Captain Kidd, and the Shadow. And you will enjoy experimenting with bizarre methods of message sending ― the Dot Code, Knot Code, Swizzle Code, and more. \u003cbr\u003eYoung cryptanalysts, cipher fans, and puzzlists of all ages will find hours of intrigue and challenge in \u003ci\u003eCodes, Ciphers and Secret Writing. \u003c\/i\u003e\"A stimulating must for the intermediate cryptographer.\" ― \u003ci\u003eThe Kirkus Reviews\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Martin Gardner\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 0486247619\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9780486247618\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Dover Publications\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 10\/01\/1984\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 96\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.31lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 8.45h x 5.41w x 0.27d","brand":"Martin Gardner","offers":[{"title":"Paperback","offer_id":44052012531967,"sku":"9780486247618","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_cd3ec5db-909b-4e59-ab42-2e9d83cd1db2.jpg?v=1685016468","url":"https:\/\/www.whiterainbookhouse.com\/products\/codes-ciphers-and-secret-writing-martin-gardner-9780486247618","provider":"WR Book House","version":"1.0","type":"link"}