Buchdetails
Format
Taschenbuch
Seiten
112
Sprache
Englisch
Veröffentlicht
Mar 1, 2015
Verlag
Usborne Publishing Ltd
ISBN-10
1409584615
ISBN-13
9781409584612
Beschreibung
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.