They were known as the “book women.” They would saddle up, usually at dawn, to pick their way along snowy hillsides and through muddy creeks with a simple goal: to deliver reading material to Kentucky’s isolated mountain communities.
The Pack Horse Library initiative was part of President Franklin Roosevelt’s Works Progress Administration (WPA), created to help lift America out of the Great Depression, during which, by 1933, unemployment had risen to 40 percent in Appalachia. Roving horseback libraries weren’t entirely new to Kentucky, but this initiative was an opportunity to boost both employment and literacy at the same time.

“Sometimes the short way across is the hard way for the horse and rider but schedules have to be maintained if readers are not to be disappointed. Then, too, after highways are left, there is little choice of roads,” c. 1940. Kentucky Libraries and Archives.
Another fascinating article at Atlas Obscura, with absolutely splendid photos! Click on over and see.