“Foxfire, book #5”, edited by Eliot Wigginton; contains a section on making a flintlock rifle.
Yes this book shows how the hobby survived from the great depression to the end of the 1950's and into the 1960's...,
then along came Fess Parker plus the centennial of the Civil War, and the hobby was greatly increased in the USA.
The Hunter of Kentucky by Ted Franklin Belue gives you some history about the flint era. Not a very long book.
The
Winning of America Series of books by Alan Eckert are thick books, but are good reads. They were done in the 60's and 70's so a bit of the information has changed as more information has come to light, but they weave actual historic characters and their actions documented in archived records into good stories and excellent reading. Because the author Alan Eckert had to "fill in gaps" between historic actions..., they are considered "fiction".
Wilderness Empire, The Conquerors, Wilderness War, and
The Frontiersmen, (read in that order; I think that's historically chronologic..., although they were not written in that order).
IF you want an eye witness history book then
Notes on the Settlement and Indian Wars of the Western Parts of Virginia and Pennsylvania from 1763 to 1783 by Joseph Doddridge is very enlightening, and although the title is really long, it's a good book, and you can read it for free..,
https://babel.hathitrust.org/cgi/pt?id=hvd.32044014178412&view=1up&seq=1
LD