The Shepherd's Crown by Terry Pratchett

Enter master story-teller Terry Pratchett's incredible Discworld in this fifth book in the Tiffany Aching series and the very final Discworld novel . . .

Tiffany Aching has finally got her wish . . .

She is a witch (and a respected one, at that). Overworked and underpaid, that's for certain, but a witch nonetheless.

But deep in the Chalk, something is stirring. The owls and the foxes can sense it, and Tiffany Aching feels it in her boots. An old enemy is gathering strength.

And while Tiffany might be a fully-fledged witch now, she's going to need help. So as the fairy horde prepares for invasion, Tiffany turns to the witches to stand with her. To protect the land. Her land.
This is a time of endings and beginnings, old friends and new, a blurring of edges and a shifting of power.

There will be a reckoning . . .