It went.
Team Zero took the right-hand passage, and for eleven minutes James had a second set of eyes running the parallel street two walls away, and it was the most comfortable he had felt since he arrived.
---
Then the city moved.
It started underfoot — a low grinding vibration that came up through the flagstones into the soles of his boots and into his teeth.
Ronan stopped dead with his fist up and everybody froze behind him.
Twenty metres ahead, a slab of wall four metres high slid sideways out of the face of a building with a sound like a millstone and crossed the passage and locked into the opposite wall, and the corridor they had been walking toward stopped existing.
Behind them, something opened.
To their left, a staircase they had passed ten minutes ago rotated on its own axis, ground round through ninety degrees, and set its top step down against a doorway it had not been anywhere near.
The dust came off the ceiling in long grey ropes.
