Perched on a sloping hill, set away from a small town by the sea, the High House has a tide pool and a mill, a vegetable garden, and a barn full of supplies. Caro, Pauly, Sally, and Grandy are safe from the rising water that threatens to destroy the town and that has, perhaps, already destroyed everything else. But for how long? Caro and half-brother Pauly arrive after her father and stepmother fall victim to a faraway climate disaster. In their new home, a converted summer house cared for by Grandy and granddaughter Sally, the two pairs learn to live together. Yet there are limits to their safety, to the supplies, to what Grandy can teach them as his health fails. A stunning novel of the extraordinary and the everyday, The High House explores how we get used to change that once seemed unthinkable, how we place the needs of our families against the needs of others – and it asks us who, if we had to, we would save.