Download or read book Writing Secret Codes and Sending Hidden Messages written by Gyles Daubeney Brandreth and published by Sterling Publishing (NY). This book was released on 1984 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.