Choose a path. Follow the clues. Solve the mystery! Hunt down clues with Henry, Jessie, Violet, and Benny Alden as they jump headfirst into a spy competition in this interactive format that allows YOU to solve the mystery! The Boxcar Children have been invited to a secret spy competition by their favorite author. But there's more to the competition than meets the eye. Can you help these savvy siblings take top prize? In this interactive, Solve-Your-Own-Mystery, readers will help the Aldens make decisions that will either lead them to victory or blow their cover. Beloved by generations of families, Boxcar Children illustrated chapter books are full of wholesome excitement, danger, and mystery.