Fathom

Three kilometers beneath Europa's ice crust, drilling engineer Nadia Bergmann is trapped in a cavern with a critically injured colleague, dwindling air, and no viable rescue path. What begins as a desperate fight for survival becomes something far larger when Nadia discovers the first alien life humanity has ever encountered—organisms that are slowly devouring the only thing keeping her alive. With nine days of breathable air, a failing power cell, and kilometers of shifting ice overhead, she must drill her way toward the surface before the cold claims them both.