Fascinating, easy-to-understand book for would-be cryptanalysts of all ages teaches how to invent and decipher a host of codes and secret messages, including the "Moving Ahead" cipher used by Julius Caesar; dots and pinpricks, as used by the secret Rosicrucian society; and even a system used by Sherlock Holmes. 14 black-and-white illustrations.
Reprint of Secret Writing Tricks, Thomas Nelson Inc., Publishers, Nashville and New York, 1975.
|Availability||Usually ships in 24 to 48 hours|
|Grade level||4 - 7 (ages 9 - 12)|
|Dimensions||5 3/8 x 8 1/2|