One, No One, and One Hundred Thousand is a novel by Italian writer Luigi Pirandello. The story follows the protagonist Vitangelo Moscarda as he embarks on a journey of self-discovery after his wife makes a casual remark about his nose. Moscarda begins to question his identity and existence, realizing that he is not the person he thought he was. He becomes obsessed with the idea of how others perceive him and sets out to change his appearance, but soon discovers that he can never truly escape the subjectivity of perception. Throughout the novel, Pirandello explores the themes of identity, self-awareness, and the fluidity of reality. The book is considered a classic of modernist literature and has been translated into several languages.