Prince Caspian is the second novel in the Chronicles of Narnia series. One year after their adventures in Narnia, the four Penvensie siblings return, only to learn that more than 1,000 years have passed there. They are called to the world by Caspian, who's in hiding from his uncle, the king. With the help of Aslan, the lion king, the children are able to restore Caspian to the throne. The novel explores the themes of growing up and of maintaining faith, even in things that can't be seen.