The Secret Shore Four are back - and this time, the ground itself is the clue.
When a pattern of damage appears at the old lighthouse, Chloe, Cam, Felix and Pickles suspect vandalism and set up watches. But what they discover is stranger than anything they expected - and far more serious.
Beneath the coastline, something is moving. And deep inside the network they uncovered in Book One, forgotten wartime equipment is telling a story that nobody else has thought to read.
The new housing development nearby isn't just changing the view. It may be putting the whole coastline - and the people who live on it - at serious risk.
The Secret Shore Four have pieced it together. Now they have to make someone listen.
Some secrets shift more than sand.
The second book in the coastal mystery series - perfect for readers aged 8-12 who enjoy real-world mysteries with genuine stakes, and for fans of the Famous Five looking for their next adventure.