When glowing seashells begin to sing across Harbor Glen

Zoe and her friends uncover a hidden message carried through the tides—one powerful enough to change the world. With storms rising and the ocean's rhythm faltering, the Sleuth Squad must decode a mysterious lighthouse signal that leads them to a forgotten underwater city.

A suspenseful STEM mystery for ages 9-13

Filled with teamwork, ocean science, emotional intelligence, and adventure.