This looks potentially interesting, don't you think?
Through the Wardrobe: Your Favorite Authors on C.S. Lewis's Chronicles of Narnia, edited by Herbie Brennan. You can find out more about it here.
Susan Juby has an essay in there, which is how I heard about it.
We're currently watching the old BBC versions of the Narnia novels. All because of our Tom Baker obsession. He's absolutely brilliant as Puddleglum in The Silver Chair.