I didn't realize that. I will be looking for it as it was definitely good enough to draw me into another adventure. I kind of hope he cuts out the double
You should write it, see how it turns out. Regarding your concerns, two things:
1. Every story about the Christian apocalypse is a story
I have this great idea that I want to work with and possibly make a story out of, and would like to know if it sounds familiar
I'll second L.E. Modesitt, Jr. and Naomi Novik for great books that combine fantasy elements with more standard technology. Both highly enjoyable authors.
Kate Daniels series by Ilona Andrews
Set in Atlanta which is slowly crumbling due to magic and technology waves which alternate throughout