Детали книги
Формат
Мягкая обложка
Страницы
112
Язык
Английский
Опубликовано
Mar 1, 2015
Издатель
Usborne Publishing Ltd
ISBN-10
1409584615
ISBN-13
9781409584612
Описание
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.