The Wee Free Men: A Story of Discworld (Carnegie Medal Winning)

There's trouble on the Aching farm-nightmares spreading down from the hills. And Tiffany Aching's little brother has been stolen away. To get him back, Tiffany has a weapon (a frying pan), her granny's magic book (well, Diseases of the Sheep)- and the Nac Mac Feegle, the Wee Free Men, the fightin', thievin,' tiny blue-skinned pictsies who were thrown out of Fairyland for being Drunk and Disordely....