{"product_id":"top-secret-book-paul-b-janeczko-9780763629724","title":"Top Secret","description":"\u003cb\u003eThe author's upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious. -- \u003ci\u003eSchool Library Journal\u003c\/i\u003e (starred review)\u003cbr\u003e\u003c\/b\u003e\u003cbr\u003ePssst  Do you know the difference between a code and a cipher? Can you tell a St. Cyr slide from a Cardano grille? Did you know that the discovery of a substitution cipher caused Mary Queen of Scots to lose her head? Don't look now, but packed into this practical field guide is everything a young person needs to know about the art of concealment -- making and breaking codes, mastering cipher systems, and experimenting with secret writing. Offering plenty of hands-on practice sessions, tips for creating a code-making kit, sidebars on secret codes in history, and an amusing pair of spies to illustrate techniques, Paul B. Janeczko's tantalizing \u003ci\u003eTop Secret\u003c\/i\u003e won't stay a secret for long. Back matter includes suggestions for further reading, an author's note, an answer key, and an index.","brand":"WoB","offers":[{"title":"GB \/ VERY_GOOD \/ INTERNAL","offer_id":49563355447569,"sku":"GOR003061281","price":10.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ LIKE_NEW \/ INTERNAL","offer_id":49608833040657,"sku":"GOR011550191","price":7.4,"currency_code":"GBP","in_stock":false},{"title":"US \/ GOOD \/ SBYB","offer_id":50152426963217,"sku":"CIN0763629723G","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"US \/ WELL_READ \/ SBYB","offer_id":50360992694545,"sku":"CIN0763629723A","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"US \/ VERY_GOOD \/ SBYB","offer_id":50952434483473,"sku":"CIN0763629723VG","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ GOOD \/ INTERNAL","offer_id":52866694480145,"sku":"GOR002760973","price":6.6,"currency_code":"GBP","in_stock":false},{"title":"US \/ NEW \/ INGRAM","offer_id":52902295142673,"sku":"NIN9780763629724","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/0763629723.jpg?v=1762339000","url":"https:\/\/www.worldofbooks.com\/en-gb\/products\/top-secret-book-paul-b-janeczko-9780763629724","provider":"World of Books ","version":"1.0","type":"link"}