Season of mists and mellow fruitfulness. That's what it felt like for Keats in 1819. How about Autumn 2016? Daniel is a century old. Elisabeth, born in 1984, has her eye on the future. The United Kingdom is in pieces, divided by a historic once-in-a-generation summer. Love is won, love is lost. Hope is hand in hand with hopelessness. The seasons roll round, as ever. Ali Smith's new novel is a meditation on a world growing ever more bordered and exclusive, on what richness and worth are, on what harvest means.