The Wee Free Men (Discworld, #30; Tiffany Aching, #1)

by Terry Pratchett

“Are you brownies?” she said. The air blurred. Milk splashed across the floor, and the saucer spun around and around. “I’ll take that as a no, then,” said Tiffany. “So what are you?” There were unlimited supplies of no answer at all.