All over the world, doors are appearing. They lead to other cities, other countries, other lives. And in a city gripped by war, Nadia and Saeed are newly in love.

Hardly more than strangers, desperate to survive, they open a door and step through. But the doors only go one way. Once you leave, there is no going back.

‘One of the year’s most significant literary works’ The New York Times ‘A masterpiece’ Michael ChabonNominated for the National Book Critics Circle Award for FictionShortlisted for the Rathbones Folio PrizeShortlisted for the British Science Fiction Association Awards for Best NovelLonglisted for the Carnegie Medal 2018 and finalist for the Neustadt Prize 2018