The name of Adolfo Bioy Casares (1914 - 1999) in Argentina - and in the world! - literature stands next to the names of Borges and Cortazar. “Borges fascinates, Cortázar convinces, Bioy Casares disturbs” - this is a brief and accurate description given by the French critic Hubert Juin to the most significant prose writers of modern Argentina. Indeed, the environment surrounding Bioy Casares caused anxiety in the writer. And this anxiety is clearly heard in the psychological science fiction novels “Plan of Escape”, “Dream of Heroes”, “Sleeping in the Sun”, which strengthened the worldwide fame of the author of “The Invention of Morel”.