Knowhow Book of Spycraft

by Falcon Travis (Author) , Judy Hindley (Author)
ISBN: 9781409562917
Publisher: Usborne Publishing Ltd
Weight: 250g
Dimensions: 277 x 220 x 5 (mm)
Description:
This book is all about keeping secrets. It shows you how toset up secret meeting places and a secret post office and how to disguise your messages and maps. It shows you lots of secret codes and signals.