{"product_id":"secret-code-book-substitution-ciphers","title":"Secret Code Book: Substitution Ciphers","description":"\u003cp\u003eThe Secret Code Book is a short introduction to substitution ciphers. The chapters ease young readers into the concept of rotation ciphers and work their way up to the Vigen�re cipher. Along the way, readers will also learn about geometric approaches to secret codes such as the Pigpen cipher.  As a bonus, there is a brief description of frequency analysis and how it is used to crack secret codes.\u003c\/p\u003e\n\n\u003cp\u003efrper gpbqr obbx\u003c\/p\u003e\n\n\u003cp\u003eIn addition, this book actively challenges readers with practice missions where answers are listed in the back. Also, there is a cut-out rotation template that is provided to make your very own cipher disk!  After reading this book, you will have all the basic tools needed to create secret messages.\u003c\/p\u003e","brand":"John Redden","offers":[{"title":"Paperback","offer_id":43997999595681,"sku":"9781387346080","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0462\/1120\/3233\/files\/1jqqe95y-front-shortedge-384_ed230f51-1e9f-4238-a11e-723c3c8957b9.jpg?v=1747214991","url":"https:\/\/bookswholesale.myshopify.com\/products\/secret-code-book-substitution-ciphers","provider":"BooksWholesale","version":"1.0","type":"link"}