This is weird. I've only tonigh downloaded this book on Audible for ideas.
I've wanted to do a post-Apoc/alien invasion ww2 project for ages, partly because there's so much good stuff for it out there, models wise (I want to do 15mm and use lots of plastic vehicles as ruined and burnt).
I don't think I'm going to do exactly this game, but I am drawing some good ideas from it.