Related Books
Language: en
Pages: 134
Pages: 134
Type: BOOK - Published: 1984 - Publisher: Sterling Publishing (NY)
Explains how to use secret codes, including Morse, Caesar's, Sandwich, Rosicrucian, and others, as well as how to send hidden messages using invisible ink, how
Language: en
Pages: 68
Pages: 68
Type: BOOK - Published: 1970 - Publisher: Scholastic
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering
Language: en
Pages: 52
Pages: 52
Type: BOOK - Published: 1997 - Publisher: Boyds Mills Press
Dozens of codes and hidden messages are presented as riddles, poems and other fun-filled expressions.
Language: en
Pages: 100
Pages: 100
Type: BOOK - Published: 1984-01-01 - Publisher: Courier Corporation
Explains various methods used in cryptography and presents examples to help readers in breaking secret codes
Language: en
Pages: 64
Pages: 64
Type: BOOK - Published: 1966 - Publisher:
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering
