The title of Jenny Erpenbeck’s fourth novel refers to a tenet of ancient Greek philosophy – the idea of the right or critical moment to act. Just how kairos impacts the novel’s two major characters becomes clear in its final gut-punch revelations. But before then, Erpenbeck recreates, in both earthy and erudite detail, the rhythms and smells of life in the German Democratic Republic in its final days.

Katharina, a 19-year-old student, is running late for her East Berlin bus. It’s July 11, 1986. In three years, the Berlin Wall will fall. Germany will begin the road to reunification. Inside the bus, Katharina locks eyes with Hans, a married 53-year-old writer and freelance radio presenter. A moment presents itself. They seize it. A coffee, then to his apartment. They listen to Mozart, make love, their relationship unfolding from here as a symbiotic one, rendered with near claustrophobic precision by Erpenbeck in an impeccable translation by the poet, Michael Hofmann.

At first, Katharina is spellbound by the things Hans exposes her to. Their connection is physical and psychological, a relationship between two generations and two Germanys. When their love twists and darkens, Katharina mostly surrenders to Hans’s interrogations, surveillance, and control. There is no sentimentality here, only contradiction and human frailty, in a relationship that is part allegory for the fate of the GDR itself. Kairos reminds us that when East Germany dissolved, an entire country disappeared, replaced with a new one many were ill-equipped to live in. Erpenbeck, born there in 1967, approaches these broken bonds and power shifts with sophistication, fierce intelligence and emotional complexity.

Late in the novel, there is a gorgeous melancholy to the way Katharina revisits all the places she had been with Hans – the traces of their intimate history layered over this new geopolitical order. The personal and the political glued together with the blood of history. Kairos is a serious, grown-up, very moving novel. We’ve hit the halfway mark of 2023, and I think I’ve just read the book of the year.