This is NOT a post-apocalyptic novel, as suggested by other reviewers, so if that's what you're looking for, you'll need to keep looking. Road Warrior it is not.
However, it does tell the story of an America (and only an America, the rest of the world seems to have been unaffected) dragged kicking and screaming into the 19th century by two pretty small nukes and the Mexican flu. Yes, the country has changed irrevocably, and large numbers of people died, but apocalyptic? Not by the actual definition of the word, no.
To me, it presented a fairly feasible possible future when the oil finally runs out, but you need to be clear; this is the story of one very isolated little hamlet of New York state. The community experiences nothing like the violence you could expect from the good old human race when left to their own devices though there are perfectly believable allusions to it in other areas. Corruption is rife, though, and that provides part of the plot. It's basically a story about how one very, very small community deals with various, sometimes dire, situations presented by other, local, very, very small communities. But, I think that's the point; globalisation (along with electricity, tyres, cars, junk food, the TV dinner) is gone. Their world has suddenly shrunk to about 80 miles in any direction. This is the story of that new small world.
It has a bit of an underwhelming ending where a few events were not adequately explained and which leaves a few characters wide open for further development, but that's not a bad thing because I like the characters and the way of life they've created. I'm actually quite keen to read the next one as I'd like to see how they're all getting on.
One thing it has made me want to do is learn a new skill. I work in I.T. which has to be the number one, post-oil superfluous industry (a fact to which the protagonist can painfully attest). Maybe I'll order a book on carpentry when I get the sequel, today.