Discover the captivating world of cracking codes in Codebreaking, a fascinating and comprehensive guide to deciphering encrypted messages. From encrypted letters to recreational puzzles, you'll delve into a range of ciphers used by lovers, criminals, diarists, and spies. In this expanded edition, you'll explore real-life examples of encrypted text on everything from 19th-century newspaper ads to wartime telegrams and notes smuggled out of prisons. You'll find exciting new details on the recent decoding of the 50-year-old encrypted message by the Zodiac Killer (Chapter 6), how amateur sleuths discovered encrypted messages by Mary, Queen of Scots (Chapter 7), and coverage of the mysterious and unsolved Voynich manuscript (Chapter 5). Hands-on instructions show how to use free software and modern codebreaking techniques to aid your analysis, and challenges throughout test your knowledge as you work through the book's many examples. Perfect for puzzle enthusiasts, history buffs, geocachers, and anyone interested in the art of encryption, Codebreaking is the ultimate guide to breaking classical encryption techniques and unlocking long-held secrets.