Over 50 Secret Codes

Children love to learn secret codes and write encrypted messages and this book will teach them everything they need to know, including Semaphore and Morse code, "Grid code" used in the American Civil War, Egyptian hieroglyphics and traditional number replacement and alphabet switching codes.

• | By (Author): Emily Bone
• | Publisher: Usborne Publishing Ltd
• | Publication Date: Mar 01, 2015
• | Country of Publication: United Kingdom
• | Number of Pages: 112 pages
• | Language: Unknown
• | Binding: Paperback|Softback
• | ISBN-10: 1409584615
• | ISBN-13: 9781409584612