(Lewis's treatment of Susan is despicable, and unforgivable. It colours the whole story once you know about it. I've never been able to enjoy them in the same way since).

Snap!
I adore The Horse and His Boy. It's always been my favourite, and I still read it occasionally even now.
And I know I said I wasn't interested in reading any Narnia smut, but I'd totally read Aravis/Lasaraleen. That'd be pretty awesome.