re: Post apocalyptic thrillers

One of my favorite books of all time but it's scifi/fantasy

Dies the fire

God or something gets mad at the world and changes the periodic table and gun powder doesn't bang, battiest and electricity doesn't work, nothing works as it should so the whole world goes black in one flash. So people who do well or historians and people who practiced old arts like renaissance festival attendies and people who studies and needed out in specific periods of midevil times and university agg departments /farmers did the beat. Pretty incredible book I loved it. If you can get through the weird tendency of the author to make up or type up some weird song from Wickans and reading a song in your head every few chapters it's great