Author : Gyles Daubeney Brandreth
Publisher : Sterling Publishing (NY)
Page : 134 pages
File Size : 36,52 MB
Release : 1984
Category : Language Arts & Disciplines
ISBN : 9780806946900
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 to take fingerprints, and other tricks and techniques.