" When he couldn’t walk anymore he sailed, and when he couldn’t sail anymore he was at the End of the World, where sat a dignified man in a dinner suit, dangling his long legs over the edge. He was patting his lapels and turning out his pockets and looking generally perplexed. “Bother,” said the well-dressed man. “I’ve lost the Key to the World. If I don’t wind it up and set its clockwork going again, the sun and moon and stars won’t turn, and the world will be plunged into an eternal nighttime of miserable cold and darkness. Bother! "

― Lev Grossman , The Magician King (The Magicians, #2)