Kif Kehlmann, a young penniless writer, is rung in the middle of the night by the notorious con man and corporate criminal Siegfried Heidl. About to go to trial for defrauding the banks of $700 million, Heidl offers Kehlmann the job of ghostwriting his memoir. He has six weeks to write the book, for which he'll be paid $10,000. But as the writing gets under way, Kehlmann begins to fear that he is being corrupted by Heidl. As the deadline draws closer, he becomes ever more unsure if he is ghostwriting a memoir or if Heidl is rewriting him - his life, his future. Everything that was certain grows uncertain as he begins to wonder: who is Siegfried Heidl - and who is Kif Kehlmann? As time runs out, one question looms above all others: what is the truth? By turns compelling, comic and chilling, this is a haunting journey into the heart of our age.