Sally Rooney’s follow-up book to her smash first novel was just named Waterstone’s Book of the Year, but she doesn’t want people to think she believes the hype. “I certainly never intended to speak for anyone other than myself. Even myself I find it difficult to speak for. My books may well fail as artistic endeavours but I don’t want them to fail for failing to speak for a generation for which I never intended to speak in the first place.”