A Box Full of Darkness by Simone St. James

A Box Full of Darkness is set in Fell, New York, where strange deaths and a decades-old disappearance still haunt the town. When the Esmie siblings’ younger brother vanishes during a childhood game of hide-and-seek, their lives fracture. Twenty years later, they’re pulled back to confront what really happened — and what may still be waiting.

Layered, eerie, and genuinely hard to put down.