S.M. Stirling stole the island of Nantucket from the present time in the Nantucket series. In Dies the Fire, he postulates that when that event happened, all modern appliances (electronics, engines, etc) stopped working in “our” world. Also, all explosives (yes including gunpowder) burn much more slowly. To top it off, steam engines are vastly less efficient. This leads the characters involved to feel it must have been an outside influence (such as “Alien Space Bats) that created what comes to be called “The Change”. The story does not go into The Change itself more than that however, rather focusing on a group of people having to live in the world post-Change.
As so often with Stirling, I found myself unable to put the book down. He does have a way to make characters pop. The two protagonists, Juniper Mackenzie and Mike Havel, are uncommonly well equipped to handle the change, and draw to them people who also have survivor traits. They seem to have more than their fair share of luck, a theme which crops up here and there. This has led to criticism from some readers, who have said it simply isn’t possible for the protagonists to make out quite so well. I would say that if they hadn’t been so lucky and skillful, they would have died along with 90% of humanity in the year after the Change.
As usual, Stirling has done meticulous research into everything from archery to Wicca. It is a pleasure to watch his characters develop through the story.