Prince Caspian by C.S. Lewis

Prince Caspian by C.S. Lewis is the fourth book set in Narnia. Caspian, the true king of Narnia has been usurped by his uncle, Miraz. Caspian longs for the olden days of Narnia when animals spoke, fawns danced, and two kings and two queens from our world ruled Narnia under Aslan. When Caspian blows a magical old horn for help it is those very kings and queens who are pulled once more into Narnia to come to his aid. Prince Caspian is very much in the vein of the earlier books, with Peter, Susan, Edmund and Lucy returning for another adventure in Narnia. It introduces two particularly standout new characters – the valiant mouse Reepicheep and the agnostic dwarf Trumpkin. It makes passing comments on scepticism and the need to follow Aslan, even when that means facing opposition or following him on your own.