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
Adaptations of The Chronicles of Narnia have also been re-released in 2005 (). The critically acclaimed BBC Radio 4 dramatisation was produced between 1988 and 1997, starring Maurice Denham as Professor Kirke. Collectively titled "Tales of Narnia" it covers the entire series and is approximately 15 hours long. The series was released in Great Britain on both audio cassette and CD by BBC Audiobooks. In 2014, the whole series was released (in the "author's preferred order") as a single audio book on Audible titled "The Complete Chronicles of Narnia" by BBC Worldwide with a total runtime of 15 hours 11 minutes. Between 1999 and 2002 Focus