The Chronicles of Narnia (although we do not learn their surname until "The Voyage of the Dawn Treader"), and eventually become Kings and Queens of Narnia reigning as a tetrarchy. Although introduced in the series as children, the siblings grow up into adults while reigning in Narnia. They go back to being children once they get back to their own world, but feature as adults in "The Horse and His Boy" during their Narnian reign. All four appear in "The Lion, the Witch, and the Wardrobe" and "Prince Caspian"; in the latter, however, Aslan tells Peter and Susan that they will not return, as
The Chronicles of Narnia in the title of the book. J. K. Rowling, author of the Harry Potter series, has said that she was a fan of the works of Lewis as a child, and cites the influence of "The Chronicles" on her work: "I found myself thinking about the wardrobe route to Narnia when Harry is told he has to hurl himself at a barrier in King's Cross Station — it dissolves and he's on platform Nine and Three-Quarters, and there's the train for Hogwarts." Nevertheless, she is at pains to stress the differences between Narnia and her world: "Narnia is literally a