Book excerpt: Codes are made for cracking. What secrets are hiding in these engaging enigmas? Readers of this interactive book will find out. They'll stretch their problem-solving muscles with these perplexing coded puzzles. Riddles help readers develop critical and creative thinking skills. Handy intros to each puzzle help readers in a pinch. Charming illustrations accompany each riddle. Readers will practice their language, logic, and math skills while having fun.