The Quantum Thief

Unruh holds out a hand, and the drone hands him a tome, black branch limb snaking up to one of the higher shelves. ‘This is the lifecast of the Count of Isidis. He belonged to a little cabal that tried to oust the King a few years before the Revolution. Naturally, they failed. But it is a fascinating period, the pre-Revolution years; when things could have gone very differently indeed. Full of gaps left by the Spike, of course. As I’m sure you can tell, I had something of a Kingdom enthusiasm phase a while back.’ There is a hollow note in his voice.

‘In any case, this is the volume I was studying when I noticed the letter. It was over here.’ The millenniaire points to a small reading desk. ‘Carefully placed so that I would see it when sitting in my favourite chair.’ He leaves the book on the table, walks over to one of the chairs and sits down. ‘Only I, my three Quiet servants and Odette – and now you – have gevulot to this place.’

‘Any other security measures?’

‘Not yet; but I am happy to give you free rein to put anything you like in place, up to and including black market tech. Odette will see to the details, just let her know.’ Unruh looks at Isidore and grins. ‘And I’d also visit Persistent Avenue with her. You will need something to wear for the party.’

Isidore coughs, suddenly self-conscious in his rumpled old Revolution uniform replica. ‘Do you mind if I take a look around?’

‘Of course not. I would imagine that you will be spending a considerable amount of time here over the next few days. I have given you access to the exomemory – apart from certain private portions – so you should feel free to explore.’

Isidore picks up the volume that Unruh set down and opens it. A dazzling display of images, video and text spills out, floating around him. Point-of-view video, sound and noise, glimpses of elegant faces and great halls—

Unruh yanks the book from his hands with a sudden violence. His eyes are bulging, and there are little patches of red on his pale cheeks. ‘I would prefer it,’ he hisses, ‘if you stayed away from the contents of the library. Many of these were . . . difficult to acquire, and I am somewhat jealous of them.’ He hands the book back to the library drone, who returns it to the shelves.

Isidore’s expression must betray his shock and rapid pulse: Unruh shakes his head and then gives him a shy smile. ‘I apologise. You have to understand a collector’s passion. And as I said, this is a very private place for me. I would be much obliged if you could carry out your investigations without … academic pursuits.’

Isidore blinks the images away and nods, heart pounding. There is a sudden hard look on Odette’s face. ‘I was never that interested in history,’ he says quietly.

Unruh laughs, an odd, coughing sound. ‘And perhaps it would be best for all of us if we spent more time in the present, hmm? In fact, that is very much what I intend to do for the next few days. I have some last-minute … human things to attend to.’ He takes Isidore’s hand again. ‘I have faith in you, M. Beautrelet. I hope I am not disappointed.’

‘I hope so too,’ Isidore says.

*

After Unruh is gone, Isidore takes out his magnifying glass and starts studying the room. It overlays the room with information: DNA traces, patterns of wear in the carpet, fingerprints and grease stains, molecules and trace elements. At the same time, he reaches for the room’s exomemory. An infinite tower of past instants opens in his head. A brief ’blink tells him that the letter is there at 8.35pm the previous night, but not a few seconds before. And there is no one in the room, either before or after. He expands the memory through the castle: a servant standing in eternal silence here, another there – and a block, hiding Unruh’s private quarters from view.

He looks at the letter again. There is no sign of self-assembly: it is actual handmade paper, or a perfect nanotech replica. Even with advanced offworld tech, it is hard to imagine a cloud of nanites constructing it out of nowhere in a matter of seconds; the energy required for such an operation would have left many other traces in the castle’s exomemory.

‘We tried all the obvious things,’ Odette says, perched on one of the armrests of Unruh’s chair, looking at Isidore, smiling her little girl’s smile. ‘I doubt your zoku toy will discover anything I didn’t.’

Isidore barely hears her: he is too focused on examining the floor and the walls of the library. As might be expected, they are solid, quickstone-laced basalt. He sits down and closes his eyes for a moment. There are fleeting images from the book that obscure the shape of the mystery, although a part of him wants to fit them in too. He brushes them aside and focuses on the letter itself. A locked room, a mysterious object; there is something almost too clean about it.

‘When was the last time you acquired something for M. Unruh?’ he asks Odette.

She touches her lips with a fingertip. ‘Perhaps three weeks ago. Why?’