Is the Central Theme of the Chronicles Disputed Sovereignty?

Narnia is a work of literature. If ther mo who god is, why it starts with god actually revealing himself. Every time jesus tries to do something, a the disciples or religious teachers, somebody opposes him. It's interesting that lewis makes such a sort of a bold argument for free will in mere christianity,. and that in most of his literary works, i'sie, no free will whatever for the people involved.