What we have here is the diary of Jacob, an Amish farmer whose family and community witness some bizarre lights in the sky one night, and then slowly, their world falls apart. Turns out there's been a devastating celestial storm, and now America--and the world--is brought to a halt.
Well, the world outside the Amish community, of course. Non-Amish are referred to as the "English" by the Amish. The Amish, not reliant on electricity, computers, and the internet, continue their simple lives, working on harvest, preserving food for the winter. But they're increasingly aware of what's happening in the outside world, and eventually, like it or not, the outside world lands on their doorstep.
I admit, I found this book a disappointment. I don't think the diary format worked well. It puts the reader at such a distance. And, bluntly, it's awfully slow until the very end. Which is how it would be--the Amish would be sheltered and just trying to continue their work. But it makes for slow reading. Plus, there's some back story with Jacob's family that isn't fully fleshed out, and the other members of his community aren't fleshed out either. I might have quit reading if I hadn't seen reviews that promised me the ending would redeem the book.
Also? Jacob's daughter has seizures and visions. Boy, is that a strained part of the narrative.
Bottom line, if you're interested in reading about the Amish in apocalyptic situations, you're better off checking out The Hallowed Ones. Much better read.