Kif Kehlmann, a young penniless writer, is asked by the notorious con man and corporate criminal, Siegfried Heidl - about to go to trial for defrauding the banks of $700 million - to ghost-write his memoir. But as the writing gets under way, Kehlmann begins to wonder: who is Siegfried Heidl - and who is Kif Kehlmann? From the Man Booker Prize-winning author of "The Narrow Road to the Deep North".