Fly by Night

Twelve-year-old Mosca Mye hasn't got much. Her cruel uncle keeps her locked up in his mill, and her only friend is her pet goose, Saracen, who'll bite anything that crosses his path. But she does have one small, rare thing: the ability to read. She doesn't know it yet, but in a world where books are dangerous things, this gift will change her life.

Synopsis from Open Library.