The Sound Under the Floor is a slow-burn horror novel about a house that listens—and a hunger that learns. When Elias and Marrow arrive at the abandoned Blackwood House, they expect rot, silence, and superstition. What they find instead is a structure that reacts to their presence: floors that breathe, walls that remember, and something beneath the boards that knows their names. As nights pass, the house reveals its true nature—not as a shelter built over evil, but as a living cage designed to c