The author who created the fictional world of Narnia is C.S. Lewis. His acclaimed series, "The Chronicles of Narnia," began with "The Lion, the Witch and the Wardrobe," first published in 1950. The stories feature captivating characters and rich allegorical themes that explore concepts of good and evil, redemption, and faith. Lewis's blend of imagination and moral storytelling has made the Narnia series beloved by readers of all ages, securing its place as a classic in children's literature.