The premise involves a small American town of three thousand sent in time back to April 1631, in an alternate Holy Roman Empire during the Thirty Years' War. The whole town. Buildings, vehicles, landscape. Sort of a Sci-Fi story.
Anyway, the details on the history of that period were fascinating. I'll be sure to check out "The Last Valley".
The Last Valley has no sci-fi elements at all, unless you count opposing religious beliefs.
Small town 20th century West Virginia coal mining hillbillies take on Europes “Nobility” in the middle of the Thirty Years War.
I’ve read pretty much all of the “1632/Ring of Fire” series of books. It’s a fascinating read and Flint and others weave historical facts into the narrative quite well.
1632 and the rest of that series are phenomenol (of course, I’m a hard science scifi fan). The only real leap of faith is the aliens doing experiments and transporting the town back in time - the rest is a masterpiece of What If? done in a very realistic way, given the premise.