The Wee Free Men:

Tiffany wants to be a which when she grows up. A proper one, with a pointy hat. And flying, she's always dreamed of flying (though it's up there - you have to wear really thick pants, two layers). cold But she's worried Tiffany isn't a very 'witchy' name. And a witch has always protected Tiffany's land, to stop the nightmares getting through. Now the nightmares have taken her brother, and it's up to her to get him back. With a horde of unruly fairies at her disposal, Tiffany is not alone. And she is the twentieth grandchild of Granny Aching: shepherdess extraordinaire and protector of the land. Tiffany Aching. Now there's a rather good name for a witch.