The dazzling, unforgettable conclusion to Ali Smith's tour de force, Man Booker-shortlisted Seasonal quartet

In the present, Sacha knows the world's in trouble. Her brother Robert just is trouble. Their mother and father are having trouble. Meanwhile the world's in meltdown - and the real meltdown hasn't even started yet. In the past, a lovely summer. A different brother and sister know they're living on borrowed time.

This is a story about people on the brink of change. They're family, but they think they're strangers. So- where does family begin? And what do people who think they've got nothing in common have in common?

Summer.