A Hat Full of Sky: The Second Tiffany Aching Adventure (Discworld Series #32)

Tiffany Aching - the boldest heroine ever to swing a frying pan against the forces of evil - is beginning her apprenticeship in magic. She expects to work hard, learn spells, and become a witch. She doesn't expect to find herself doing chores, caring for the careless, and trying to outthink an ill-tempered nanny goat. There must be more to witchcraft than this!

But as Tiffany pursues her calling, an insidious, disembodied creature pursues Tiffany. When it strikes, neither Mistress Weath…