@johnbwes thanks! I'm glad you've enjoyed it and I hope they've been helpful and illuminating. Mostly I wanted to grow myself as a person and as a writer. I've always been ambitious in my writing projects, and I've enjoyed The Screwtape Letters since I was a teen, so I always liked the idea of continuing Lewis' work. I understand why he thought himself unable to write them, and I don't pretend that I can do any better. I've just found that my best work is produced when I aim high. "Shoot for the moon, end up among the stars," kind of thing.
I know I haven't updated this in awhile, so I really appreciate the comment out of the blue. It incites me to think about it more. I do definitely want to finish it in a satisfying way at some point, but a project like this may ultimately end without a proper ending. But that's the thing about ideas like this. They may seem absent for years, but when things need to be addressed a certain way, it's like they've never left. They're always there when you need them the most.