The second volume of Philip Pullman's The Book of Dust sees Lyra, now twenty years old, and her daemon Pantalaimon, forced to navigate their relationship in a way they could never have imagined, and drawn into the complex and dangerous factions of a world that they had no idea existed. Pulled along on his own journey too is Malcolm; once a boy with a boat and a mission to save a baby from the flood, now a man with a strong sense of duty and a desire to do what is right.

Theirs is a world at once familiar and extraordinary, and they must travel far beyond the edges of Oxford, across Europe and into Asia, in search for what is lost - a city haunted by daemons, a secret at the heart of a desert, and the mystery of the elusive Dust.