As the Schaubühne Berlin's production of Henrik Ibsen's 'An Enemy of the People' opens at The Barbican, Anne McElvoy speaks to the play's director Thomas Ostermeier. American novelist Joseph O'Neill discusses his new book 'The Dog' and, continuing the series meeting this year's shortlisted authors for the Man Booker Prize, Ali Smith explains the connected stories which comprise her novel 'How to Be Both'.