American-Libyan writer Hisham Matar’s new novel is about three Libyan men in political exile in London, and the emotional homeland that deep friendships can provide. It begins in 1984, the year that officials inside the Libyan embassy in London’s St James’s Square fired a machine gun into a crowd of unarmed protesters. Matar’s earlier novel, The Return: Fathers, Sons and the Land in Between, about his father’s abduction by Gaddafi’s forces and the decades-long quest to discover his fate, won the Pulitzer Prize in 2017. He discusses his new book with Alex Clark.