The Code-Breaking Challenge contains more than 100 codes to crack and ciphers to solve. Puzzles of all difficulty levels are featured, from simple substitution ciphers to devilishly difficult double-coded codes. Don't worry though - clues and solutions are on hand! Codes and ciphers have been used to keep secrets for thousands of years and have had a surge in popularity recently, thanks to The Da Vinci Code. This book is your chance to join in and take The Code-Breaking Challenge . Even the simplest codes can disguise data effectively - just because a code is simple does not make it easy to crack. So, if you have perseverance, sharp wits, and a degree of cunning you will triumph over every obstacle placed before you on your way through. This book features a wide variety of codes devised by all sorts of people, from Julius Caesar to the Rosicrucians (an ancient secret society). It is a unique collection of fascinating codes that will give you many hours of fun and intellectual stimulation.