Footprints Under the Window

About “Footprints Under the Window”

Frank and Joe Hardy take on a dangerous case when a top-secret instrument for the U.S. space program is stolen. Their father, a famous detective, is missing, leaving the brothers to solve the mystery alone. They rescue a South American stowaway who warns them about "Footprints" before disappearing. The boys find missing documents from their father and notice strange footprints, leading them to suspect the stowaway. Their investigation leads them to a group of islands off South America, where they face a ruthless spy ring and a cruel dictator. They uncover a grisly secret in the jungle and endure a terrifying night in a cemetery and a flooded ship compartment. The story is filled with suspense and action, testing the courage of the Hardy boys and their friend Chet Morton.