Thanks,
@Extollager! From my experience with trying to get other things over from America, postage normally breaks the bank. I will take a look though, both at the editions you've recommended and in general. It's been a little while since I've properly tried to seek a MacDonald book out.
I currently have a nice paperback copy of Phantastes, which contains an introduction, short biography and detailed annotations on the text by writer and historian Nick Page. I believe a similar edition was meant to be published for Lilith (it's advertised at the back of the book), but I could never find a word about it anywhere online, so I've wondered if it was planned but never released (again, it's been long enough that I should probably have another explore!). I do own a copy of Lilith, but I enjoyed Page's unpacking so much that I would love to reread it in a similar manner.
I think I have one non-fantasy work of McDonald's on my to-read... David Elgenbrond it might be called? I've never hear of the two you've mentioned though, so I'll look into them too! Thank you for the recommendations