This audiobook is narrated by an AI Voice.
A buried clue. A mysterious cipher. A summer they won’t forget.

At Maple Grove Elementary, summer school was supposed to be calm. But when a curious group known as the Silver Key Society discovers something strange during a campus cleanup project, they’re drawn into a new mystery—one filled with hidden symbols, unanswered questions, and a message that’s waited years to be found.

Perfect for readers ages 8–12 who love teamwork, school-based mysteries, and light suspense, this third book in The Silver Key Society series follows the team as they take on a special summer case filled with observation, logic, and imagination.

Includes bonus materials:
A cipher design activity
A Silver Key Society certificate
Maya’s Case File #9 Notes
A create-your-own case file template
A code-breaker quiz (multiple choice)
A staff interview with Ms. Dalton
A Secret Spaces activity