描述
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.
書籍詳情
格式
平裝書
頁數
112 頁
語言
英語
已出版
Mar 1, 2015
出版商
Usborne Publishing Ltd
ISBN-10
1409584615
ISBN-13
9781409584612