You'd better tell me what you know, toad," said Tiffany. "Miss Tick isn't here. I am." "Another world is colliding with this one," said the toad. "There. Happy now? That's what Miss Tick thinks. But it's happening faster than she expected. All the monsters are coming back." "Why?" "There's no one to stop them." There was silence for a moment. "There's me," said Tiffany. - Terry Pratchett