“That’s the last one,” said Cade, placing a motion detector in the far corner of the emergency tube on Level 8. “If someone comes through here, you’re sure you’ll be able to hear it, Andrew? One beep?”
“There does not appear to be any degradation in the quality of the station’s sound sensors. I should be able to determine the source of a single beep of any of the motion detectors you and Elle have placed,” replied. Andrew. “A single beep is unlikely to make Mr. Canvin suspect his movements are being tracked.”
Elle frowned. “I hope so. And how are you so certain he’ll be moving into the lower levels? What’s he here to steal?”
Cade began climbing the ladder to Level 9 and paused halfway up, curious about Andrew’s response. ...