 After the liberation of Paris, Eisner rejoined Langlois and became Chief Curator at the Cinémathèque Française where over a period of forty years she was responsible for collecting, saving and curating films, costumes, set designs, art work, cameras and scripts for the Cinémathèque archive.At the same time, Eisner began to work in private on her book "L'Écran démoniaque" later translated as "The Haunted Screen" which she described in a letter to Fritz Lang as "a book on German silent film".She also published essays, articles and film reviews in journals including "Revue du cinéma", which later became "Cahiers du cinéma".