Doppelganger by Fyodor Dostoyevsky is a novel in which the author explores the psychological and philosophical aspects of human identity. The main character, Yakov Petrovich Goliadkin, meets his doppelgänger, who begins to haunt him and complicate his life. Through this meeting, Goliadkin is faced with his own fears, complexes and ambitions, which appear before him in the form of the image of a double. The book raises questions about mental anguish, self-identification and the limits of reality, making the reader think about the nature of human existence and the theatricality of life. In this work, Fyodor Dostoevsky wittily reveals the complexity of human psychology and the eternal struggle with his own shadow.