I've been listening to a fair few interesting audio books. Finally after years of not bothering I have begun listening to the Silmarillion. I've also got the complete Chronicles of Narnia to listen to at some point, having listened to radio dramatizations of Prince Caspian and the Dawn Treader (amusingly with Sylvester McCoy as Reepacheep).
I'm planning on hitting the Last Battle soon, though to be honest I didn't like it when I read it as a child. Aside from its apocalyptic overtones which make it unlikely to ever be adapted it's probably the first book I thought of as being "a bit gay" to be honest (though as a child I probably didn't use those words). I vaguely remember King Peter turning up inexplicably and a fair bit of boy-on-boy (platonic but I was 9 remember) kissing at the end.
Worse it turns out almost all our beloved main characters from previous books have died horribly and are now going to "true" Narnia. The thinly veiled Christian allegory is laid bare, which is fair enough, but it's a pretty horrible way to do it in my opinion. The Last Battle really didn't need to be written.
Of even more discomfort is the fact that Susan does not appear in the Last Battle, having refused to attend the "Narnia Reunion" that resulted in everyone else dying horribly in a train crash. Apparently she is "no longer a friend of Narnia... she's interested in nothing now-a-days except nylons and lipstick and invitations". Again rather troubling in what was for a 9 year-old me a very very uncomfortable read.
Apparently I was not alone - as when more recently I started working my way through Fragile Things, a collection of short stories by Neil "Does Not Look Like Ross From Friends Steve" Gaiman I came across his story, the Problem of Susan.
I should point out you can read The Problem of Susan online. It's a well-written story but like a lot of Neil Gaiman's non-kiddie Stardusty stuff it's rather disturbing (particularly the image of the White Witch literally riding Aslan) though it does paint a rather sad picture of poor Susan.
Also he does seem to take the rather disconcerting view that Susan didn't go to Narnia because she got interested in sex and boys, rather than what I read to be being interested in ephemeral trappings (makeup and so forth). Me personally - I like to think she would've mended her ways and gone to "true" Narnia in the future. After all heaven without your friends is like being locked up in a small room with your friends forever.