Narnia is... a Christian faery tale that is very well disguised. To give you a quick run down of the first book, we have a talking lion, a stone table, a warddrobe, an ice queen, a lamp post, four children and Turkish Delight. Good vs Evil, with a little Evil Victory, followed by a Good Triumph. And that just sets the stage for six other books.
Of course, I read them out of order. I started with the Magician's Nephew quite by accident and shockingly, the whole story makes a heck of a lot more sense.

You read the Darksword Trilogy? And you admit it?

Didn't you feel betrayed by the ending? Hickman and Weis (no literary greats to start with) really stuck their heads up each other's asses with that story.