Sophie’s World is a highly acclaimed 1991 novel by Norwegian author Jostein Gaarder that weaves a coming-of-age story around a comprehensive history of Western philosophy. Selling over 40 million copies worldwide and translated into dozens of languages, it remains one of the most commercially successful Norwegian novels of all time. While Gaarder has written several other philosophically themed books such as The Solitaire Mystery and Through a Glass Darkly—which some readers informally associate with his landmark work—he has never published an official, direct sequel to Sophie's story. While Gaarder has previously expressed open interest in potentially writing a sequel depending on various creative considerations, no official announcement or production timeline for a direct sequel novel has been established. Meanwhile, the original book has continued to expand its reach through other mediums, including a two-part graphic novel adaptation completed in late 2023.