Mary Ann Carr 
Great Chocolate Caper [PDF ebook] 
A Mystery That Teaches Logic Skills (Rev. Ed., Grades 5-8)

Reginald Van Feisty, owner of the world-famous chocolate factory, Dutch Delight Chocolates, is excited about his brand-new recipe for chocolate. But, before he can manufacture even the first chocolate bar, the recipe is stolen! Have your students discover who stole Van Feisty’s famous chocolate recipe and they’ll not only be great detectives, they’ll be masters of logical thinking. There are nine suspects, but which one is guilty? This mystery becomes a vehicle for teaching logical thinking. In solving the mystery, students will: differentiate between valid conclusions and invalid assumptions, use syllogisms to reach valid assumptions, recognize false premises, solve deductive matrix puzzles, and decode a secret message.Grades 5-8