C.S. Lewis created one of the most enduring works of children's fantasy with The Chronicles of Narnia, a series of seven novels published between 1950 and 1956 that follow various children as they travel between our world and the magical land of Narnia. The series begins with The Lion, the Witch and the Wardrobe, in which four siblings discover that a wardrobe in an old professor's house is a portal to a frozen kingdom ruled by the tyrannical White Witch. There they encounter Aslan, the great lion who serves as Narnia's true ruler and whose sacrifice and resurrection form the emotional and theological core of the story. Lewis, an Oxford and Cambridge literary scholar and close friend of J.R.R. Tolkien, embedded Christian themes throughout the series, though the books work equally well as pure adventure stories for readers unaware of the allegory. Subsequent volumes expand Narnia's history from its creation to its apocalyptic end, introducing new child protagonists and exploring themes of courage, temptation, loyalty, and the nature of faith. The Horse and His Boy takes place entirely within Narnia's world, while The Magician's Nephew reaches back to its origins. The books feature Lewis's gift for vivid worldbuilding: talking animals, marshwiggles, dryads, and a geography that feels both fantastical and internally consistent. Lewis writes with clarity and directness, never condescending to his young readers while addressing profound questions about good, evil, sacrifice, and what it means to grow up without losing the capacity for wonder. The series has remained continuously in print, introducing successive generations to a fictional world that rewards rereading at every age.