 Before the release of The Chronicles of Narnia : The Lion , the Witch and the Wardrobe , the screenplay for the sequel Prince Caspian had already been written . Director Andrew Adamson said the decision was made to follow the publication order of the novels because " if we don 't make it now we 'll never be able to , because the [ actors will ] be too old " . Prince Caspian , the second published novel in the series , is the fourth chronologically . The Horse and His Boy takes place during a time only hinted at in The Lion , the Witch and the Wardrobe . The writers briefly considered combining Caspian with The Voyage of the Dawn Treader , which the BBC did for their television adaptation . 
