Hear Pat Barker discuss her new book 'Toby's Room', in which she revisits the trauma of World War I for the first time since her unforgettable trilogy 'Regeneration', the final volume of which won the Man Booker prize in 1995.

Her heroes Toby and Elinor, brother and sister, friends and confidants, share a dark secret from the summer of 1912 that is carried into the battlefields of France and wartime London in 1917.

A riveting drama (and whodunit) that examines identity, damage, intimacy and loss.

In association with The Economist.