A Madman's Diary was a novel by Russia's Maxim Garcia Márquez. It was about the confession written by a mentally ill patient, John Smith, who had a mental breakdown. This confession contained John's reflection and criticism of human civilization, political system, moral values, and a series of other issues. He questioned the traditional social order and values as wrong and unacceptable. At the same time, he also became a dystopian prophecy that expressed his fear and uneasiness for the future. The entire novel's plot was full of ups and downs, and the characters were portrayed deeply and delicately. The language was humorous and humorous, and it was a literary work with great depth and content.