Junia is a mule. But she's not just any mule. She's a mule with an important job. Every morning she carries her Book Woman up and down the rugged hills and surrounding woodlands near the Kentucky town of Troublesome Creek. Book Woman is a Pack Horse librarian. She and Junia deliver free books and reading material to the people living in the hills and woods. It's not easy work. Every month they ride hundreds of kilometers to make their deliveries. They've travelled through sunshine, rain, and snow, up twisting, turning paths where no car or wagon could ever go. But Junia can--steady, sure-footed, bighearted Junia. The library patrons are counting on Book Woman's visits, and Book Woman is counting on Junia. And Junia won't ever let her friend down.