You might enjoy a series of "sort of sci-fi but more about energy and technology" books by James Howard Kunstler. It's his "World Made by Hand" series. The story begins with an off stage event involving just a very few atomic explosions, a few EMPs, and fried electronics. As is well known, integrated/printed/miniaturized electronics are very susceptible to EMPs, and very few people are still using vacuum tube devices which aren't susceptible.
The country is cast back into the late 19th century as far as technology is concerned. From now on, they will have to make what they need by hand -- hence the title. The story is NOT about lovely hand-made furniture.
WMBH is set in a very small upstate New York village. Recovery is difficult, and there aren't really any miracles to help them out. If I remember correctly, the story covers 2 or 3 years, maybe a little longer. The reduced population of the village survive, and life goes on -- but in a very reduced way. Very large numbers of people in the country died off because adaptation was impossible for most people. (take Chicago, New York, LA, Houston -- feeding that many people can't be done without modern transportation. True, New York was large and was fed in the late 19th Century; so was Chicago and many other cities. But the existing organization and animal-based traction technology long since disappeared. Yes, 19th century tech can be recovered, but not in one or two years. It would take decades to reconstruct.
There are several volumes in the series; they are realistic, pessimistic, but in someways hopeful. That's what Kunstler's lecturing and non-fiction books are about -- if we are going to survive as a species, we are going to have to radically change the kind of life we maintain and exist in. It will probably need to resemble the 19th century in many ways (animal traction, minimal electronic devices, a far less centralized economy, smaller population, etc.). We would have to live much like the Amish live.
A World Made By Hand isn't going to change your ideas about the world, but they are very interesting stories.
EARTH ABIDES is another one -- this much older, written in 1949. It posits a plague that quickly kills most of the world's population -- like... 99.99%. There's no horror in the novel. The story focuses on a small group's efforts to survive in Oakland, CA. They do survive, though along much different lines than their tech-oriented leader had thought they would.
Earth Abides is interesting because the world that ended in 1949 was so much less "technical" than the present one. For instance, the star of the novel decides to drive across country and decides that Highway 66 would be the best bet. When I read that I thought... "why would he not travel on the interstate freeways?"... Oh right, they hadn't been built yet. Television? Invented, but barely in use; radio, yes; telephone, yes; electric lights, yes; refrigeration and natural gas, yes. All that was now gone. So there were many adaptations necessary. A surprising and interesting conclusion to the book.