This spy-themed title in the hugely successful Clever Kids® series contains over 100 code conundrums and cryptograms to exercise young minds.From hidden words and logic puzzles to code breakers and enigmas, it’s packed with secret-agent and spy challenges to put kids’ mental agility, logic and lateral-thinking skills to the test. Created by bestselling puzzle book author Gareth Moore, author of the chart-topping Brain Games for Clever Kids.