If you are a Narnia fan you will appreciate three excellent lectures by Archbishop Rowan Williams which can be downloaded here. The lectures are entitled:
1. Not a tame lion
2. I only tell you your own story
3. Bigger inside than outside
The Archbishop masterfully covers most of the Narnia chronicles and draws out themes that cover Christian theology in a way that is as engaging for adults as the original stories were (and still are) for children.