In The House In The Dark Of The Woods by Laird Hunt

A spare, fable-like novella that follows a woman living alone in a remote farmhouse after her child vanishes into the surrounding woods; as neighbors and searchers come and go she refuses to leave, keeping a relentless vigil while grief, memory, and an uncanny encroaching wilderness blur the boundaries between reality and myth, yielding a haunting meditation on loss and the human need to make sense of absence.

Purchase from Bookshop.org