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 maps of Tolkien's Middle-earth, is available in print and in an interactive version on the DVD of the movie. The latter map depicts only the country Narnia and not the rest of Lewis's world. A recurring plot device in "The Chronicles" is the interaction between the various worlds that make up the Narnian multiverse. A variety of methods are used to initiate these cross-overs which generally serve to introduce characters to the land of Narnia. The Cosmology of Narnia is not as internally consistent as that of Lewis's contemporary Tolkien's Middle-earth, but suffices given the more fairy tale atmosphere of