She closed her eyes and there was a click that Case felt rather than heard. It made him remember the magnetic locks on the door of her cubicle in the puppet place. The door had opened for him, even though he’d had the wrong chip. That was Wintermute, manipulating the lock the way it had manipulated the drone micro and the robot gardener. The lock system in the puppet place had been a subunit of Freeside’s security system. The simple mechanical lock here would pose a real problem for the AI, requiring either a drone of some kind or a human agent.