My dear children!" Nellie whopped him upside the head with her backpack. "Ow!" Uncle Alistair curled over, cupping his hand over his good eye. "Nellie!" Amy said. "Sorry," Nellie muttered. "I thought he was one of the bad guys.
Rick Riordan (2016). “The 39 Clues 1: The 39 Clues: The Maze of Bones”, p.140, Scholastic UK