The Secrets Below by Alisa Shaw

When disgraced attorney Claire Bennett retreats to her grandfather's secluded cabin on Blackwater Lake, she expects two weeks of quiet reflection. Instead, she witnesses what appears to be a brutal murder—and suddenly becomes the target of a sophisticated game of deception.

Across the lake, tech billionaire Ethan Vale and his enigmatic wife Sophie harbor secrets darker than the stormy waters that surround them. As Claire's reality unravels—objects move on their own, digital footprints appear that aren't hers, and sinister whispers hint at betrayal—the line between truth and illusion blurs.

With family ties entangled in decades of corruption, Claire must navigate a treacherous path of gaslighting, moral compromise, and revenge. Every revelation pulls her deeper into a world where trust is lethal, identities are false, and some truths are better left underwater.

Fans of Harlan Coben, Gillian Flynn's Gone Girl, and Sharp Objects will be riveted by this atmospheric thriller, where the lake hides more than secrets—it conceals sins that could drown everyone involved.