NEF

“Has it ever occurred to you that maybe you’re sane? That you’ve always been sane? That perhaps you’re the sanest person in the city?"

"I hope not," whispered Neverfell. "Because, if I’m sane, then there’s something wrong with Caverna, something horrible and sick, and nobody else has noticed. If I’m sane, then we shouldn’t be sitting around talking – we should all be clawing our way out as fast as we can."

"Oh, I don’t think she’d like that," the Kleptomancer remarked, with a hint of affection in his voice. "She needs us. Without us, there is no her, after all. She is the city, not the tunnels, and so she does everything she can to keep us down here. Sometimes I even wonder whether it is only possible to create True Delicacies here because she gives them their power, as a bribe to stop us leaving. When the Grand Steward declared that nobody was allowed to enter or leave the city, I believe he became her chosen beloved. I will tell you something else, though I cannot prove it. The city grows, and not just through the effort of pick and shovel. She has been stretching, spreading and contorting to make room for us all, and I think that is why geography no longer makes sense.”
― Frances Hardinge, A Face Like Glass