General Antonyms:
* Autobiography: A biography written by the subject of the book themselves.
* Fiction: A story that is made up and not based on real events.
* Autofiction: A genre that blends autobiography with fiction.
More Specific Antonyms:
* Obituary: A notice of someone's death, often including a brief summary of their life.
* Historiography: The writing of history, which focuses on events rather than individuals.
* Mythology: A body of stories about gods, heroes, and other supernatural beings.
The best antonym will depend on what you are trying to express. If you want to contrast a factual account of someone's life with a fictional story, then "fiction" would be a good choice. If you are contrasting a biography with a historical account of a period, then "historiography" might be more suitable.