Susannah Clapp talks to Adam Thorpe , author of Ulverton, about his new novel Nineteen Twenty-One, which tells the story of Joseph Munrow, holed up in a cottage in the Chilterns during the scorchingly hot summer of 1921 trying to write the first great novel of the Great War. Thorpe's novel re-examines England at a time when it was transformed for ever and, in the aftermath of war, asks, in what sense can art be made of such horror.