Even French's most urban novels always have one eye on the power and mystery of the natural world, and Cal's chosen village, Ardnakelty, is remote, rural, and overlooked by brooding mountains. The young people are fleeing the area, and most of those left behind are either tough, bitter old men or relentlessly gossipy and communal women. Cal tries to fit in but he's never quite sure how well he's doing; as he grows closer to desperate Trey, and closer to the heart of the mystery, the gaps between his world and the village world begin to widen.
This is a book about gender, about being outcast and the price of conforming. Expectations are flipped. There is unexpected and inexplicable violence. As always with Tana French, while the mystery is the engine that keeps the story pumping, the true satisfaction lies in the careful, vivid evocation of place and the deep exploration of character. There are things we need to know about Cal's past that we don't find out until quite late in the story; he has thrust down some uncomfortable truths far out of our sight, and his own.
Slowly, Cal works on the abandoned house he is renovating. Whether he will ever succeed in making a home there, or in the village whose secrets he has uncovered, we will never know for sure.