"Those who delight in puzzles can find much to ponder on here," declared Science News Letter
of this excellent introduction to cryptography. Concise and simple explanations cover transposition and substitution ciphers, codes, and their solutions. More than 150 problems provide practical applications as well as tests of ingenuity.
Reprint of the first 1943 edition.
|Availability||Usually ships in 24 to 48 hours|
|Author/Editor||Laurence D. Smith|
|Grade level||5 and Up (ages 10 and up)|
|Dimensions||5 3/8 x 8|