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 eventually swallowed up by the evil Calormene god Tash. The main setting of "The Chronicles of Narnia" is the world of Narnia constructed by Lewis and, in "The Magician's Nephew", the world containing the city of Charn. The Narnian and Charnian worlds are themselves posited as just two in a multiverse of countless worlds that includes our own universe, the main protagonists' world of origin. Passage between these worlds is possible, though rare, and may be accomplished by various means. Narnia itself is described as populated by a wide variety of creatures, most of which would be recognisable to those