Fun with secret writing Geoffrey Lamb
Publisher: Mineola, N.Y. : Dover Publications, 2002.
ISBN: 0486420981
DDC: 652.8
LCC: Z103.3
Summary:
Examines a number of different ways of writing secret messages,
including using invisible ink and a variety of ciphers. Provides
suggestions and aids for code-breaking.
Notes:
Originally published: Secret writing tricks. Nashville, Tenn.: T.
Nelson, 1975.
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