Pratchett's final Discworld novel--and the fifth to feature the witch Tiffany Aching--in which, as the fairy horde prepares for invasion, Tiffany must summon all the witches to stand with her to protect the land: her land.
A young witch-to-be named Tiffany teams up with the Wee Free Men, a clan of six-inch-high blue men, to rescue her baby brother and ward off a sinister invasion from Fairyland.