The Adversary is a French non-fiction book by Emmanuel Carrère first published in France as L'Adversaire in 2000 by Folio. The book was published in English in 2001 under the title The Adversary: A True Story of Monstrous Deception. Carrère stated that his work was influenced by Truman Capote's In Cold Blood and he included himself in the narrative as a direct reaction to Capote excising himself from his own work despite his close relationship with the murderers he wrote about. Source: Wikipedia (en)