by Lisa Miles (Author), Anne Millard (Author)
There is a code for every occasion in this b ook. Young readers can find out how to invent their own sets of secret signals and how to scramble messages in countless different ways. '
Format: Paperback
Pages: 32
Publisher: Usborne Publishing Ltd
Published: 31 Dec 1995
ISBN 10: 074602794X
ISBN 13: 9780746027943