Camilla told me before I moved in that I’d be required to open One Folgate Street to visitors occasionally. Back then it hadn’t seemed a great hardship, but as the first open day approached I found myself dreading it more and more. It wouldn’t just be the house that was on display, I felt, but me. For days now I’ve tidied and cleaned, careful not to infringe even the smallest rule.

“Architects and their clients have long sought to create buildings with a sense of purpose,” the guide continues. “Banks look imposing and solid partly because the men who commissioned them wanted to instill confidence in potential depositors. Courtrooms seek to impose respect for law and order. Palaces were designed to impress and humble those who entered them. But today some architects are using new developments in technology and psychology to go far beyond that.”

The guide is very young, with an overly fashionable beard, but I sense from his air of authority he’s probably some kind of lecturer. Not all the visitors look as if they’re students, though. Some could be curious neighbors or tourists.

“You probably aren’t aware of it, but you’re currently swimming in a complex soup of ultrasonics—mood-enhancing waveforms. That technology is only in its infancy, but it has far-reaching implications. Imagine a hospital where the structure itself becomes part of the healing process, or a home for dementia sufferers that actually helps them to remember. This house might be simple, but its ambition is extraordinary.”

He turns and leads the way toward the staircase. “Please follow me in single file, taking special care on the steps.”

I stay downstairs. I can hear the guide’s voice explaining how the lighting in the bedroom reinforces the users’ circadian rhythms. Only when they come down again do I slip upstairs myself, to get some privacy.

With a shock I realize one of the group is still in the bedroom. He’s opened the cupboard, and although he has his back to me, I’m fairly sure he’s looking through my clothes.

“What the hell are you doing?” I demand.

He turns around. It’s one of the ones I’d taken for a tourist. His eyes, behind rimless spectacles, are pale and calm.

“I’m seeing how you fold your things.” His voice is slightly accented. Danish, perhaps, or Norwegian. About thirty years old, wearing a slightly military-looking anorak. Fair, receding hair.

“How dare you!” I explode. “Those are private.”

“No one who lives in this house should expect privacy. You signed that away, remember?”

“Who are you?” He sounds far too well informed for a tourist.

“I applied,” he says. “I applied to live here. Seven times. I would be perfect for it. But he chose you instead.” He turns back to the cupboard and starts to unfold and refold my T-shirts, as fast and neat as a shop assistant. “What does Edward see in you? Sex, I suppose. Women are his weakness.” I am breathless with anger, but the realization that this man standing in my bedroom is almost certainly deranged has paralyzed me. “He’s inspired by monasteries and religious communities but he forgets that women were excluded from those places for a reason.” He picks up a skirt and folds it in three deft movements. “Really, you should leave. It would be much better for Edward if you went. Like the others.”

“What others? What are you talking about?”

He gives me a smile of almost childish sweetness. “Oh, hasn’t he told you? The ones before. None of them last, you see. That’s the whole point.”

—

“He was crazy,” I say. “Terrifying. And the way he spoke—it was as if he knew you.”

Edward sighs. “I suppose he does, in a way. Or at least, he thinks he does. Because he knows the work.”

We’re sitting in the refectory area. Edward has brought wine, something exquisite and Italian. But I’m still a little shaky and in any case I haven’t really been drinking since I moved to One Folgate Street. “Who is he?”

“At the office they call him my stalker.” He smiles. “That’s a joke, of course. He’s actually quite harmless. Jorgen something. He dropped out of an architecture degree with mental health problems and became slightly obsessed with my buildings. It’s not that uncommon. Barragán, Corbusier, Foster—they’ve all had disturbed individuals fixated on them, believing they have some special connection.”

“Have you told the police?”

He shrugs. “What would be the point?”

“But Edward, don’t you see what this means? When Emma Matthews died, did anyone ever check to see if this Jorgen person was around?”

He gives me a wary look. “You’re not still on about that, are you?”

“It happened right here. Of course I think about it.”

“Have you been talking to the boyfriend again?” Something about the way he says it suggests he wouldn’t be pleased if I had.

I shake my head. “He hasn’t been back.”

“Good. And believe me, Jorgen wouldn’t hurt anyone.” He takes another mouthful of wine, then bends down to kiss me. His lips are sweet and bloody with grape.

“Edward…” I say, pulling away.

“Yes?”

“Were Emma and you lovers?”

“Does it make a difference?”

“No,” I say. Of course I mean yes.