Let children develop tehir deductive thinking skills as they determine who stole Reginald Van Feisty's new recipe for chocolate. Children will learn to solve various logic problems, each of which provides a clue to unraveling the mystery. The book is divided into lessons, each of which introduces a skill. Lessons include learning the difference between valid and invalid assumptions, learning the difference between valid conclusions and dangerous generalizations, recognizing false premises and six other skills. Answers to each lesson are included, as well as practice puzzles and a Certificate of Merit that can be photocopied and given to children who solve the mystery.