One of the first Usborne books to be published, reissued for the 40th anniversary of Usborne Publishing. This book shows you how to set up secret meeting places, how to disguise your messages and much more. As used in evidence at the high court trial of Soviet spy Oleg Gordievsky, who testified that this book gave away the KGB's tradecraft.
Prenumerera på vårt nyhetsbrev för att få fantastiska erbjudanden och inspiration för din nästa läsning.
Genom att registrera dig accepterar du vår personuppgiftspolicy.