The Lens Below the Tide

Mara swore she'd never return to the island—or face what her mother left buried beneath it. But a fractured lens hidden in the drowned caverns below the lighthouse holds a secret older than the tides, and someone else is already searching for it. With a savage storm bearing down and the sea reclaiming the tunnels hour by hour, Mara must navigate treacherous depths and a past she abandoned before the ocean swallows everything for good.