Sophie's World is a 1991 novel by Jorstein Gaarder about a teenage girl named Sophie learning about the history of philosophy from a mysterious middle-aged man. After receiving mysterious messages in her mailbox, Sophie begins a correspondence with the 53-year-old philosopher Alberto Knox, learning everything from Plato to Sartre. Eventually Sophie's story is revealed to be a story written by Albert Knag for his daughter Hilde. The plots intertwine, Hilde struggles to free them and finally Sophie and Alberto escape the narrative control of Albert.

Summary of Sophie's World by Jostein Gaarder

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