A page-turning novel that is also an exploration of the great philosophical concepts of Western thought,Sophie's Worldhas fired the imagination of readers all over the world, with more than twenty million copies in print.One day fourteen-year-old Sophie Amundsen comes home from school to find in her mailbox two notes, with one question on each: "Who are you?" and "Where does the world come from?" From that irresistible beginning, Sophie becomes obsessed with questions that ta