"Of course," I said. "I only report to my client, in this case Lady Luck. What she might do with the information afterwards is something you and she would have to sort out between you. Is that acceptable to you?"

He nodded, and we all smiled at each other in a very civilised way. Behind the smiles, I was quietly seething. Having Pretty Poison along struck me as a really bad idea. Things were going to be complicated enough without having a demon succubus from Hell peering over my shoulder. (Assuming I ever was stupid enough to turn my back on her.) But it was clear her presence was a deal-breaker for Sinner, so I had no choice but to agree, for now. Maybe we could use her for defusing booby-traps.

"Oh dear," Sinner said abruptly, rising to his feet. "I do believe something bad is about to happen."

I looked quickly about me. "What makes you say that?"

"Because Madman's music has just got all tense and dramatic."

He was right. It had. And thirteen men in smart city suits were strolling arrogantly through the Library stacks towards us. A Devil's Dozen of proud, purposeful-looking men, all of them heading straight for me. The few remaining scholars were gathering up their papers and fading away into the surrounding stacks with remarkably speed and dexterity. Even the Library staff were making themselves scarce. They didn't want anything to do with what was about to happen, and I didn't blame them. I knew who these thirteen men were. These were Walker's famous, or more properly infamous, I Mean Business people-the legendary Reasonable Men. So called because Walker sent them out to reason with people who were causing the Authorities particular concern.

Every one of the Reasonable Men was a refined gentleman, in an immaculate suit set off by the old-school tie, moving with that calm, arrogant grace that only comes from centuries of breeding and lording it over the peasants. Some of them looked around the Library and sniffed superciliously, as though they were slumming just by being there; and perhaps they were. I didn't underestimate them just because they didn't have a chin among them and looked like a bunch of upper-class twits. The Reasonable Men were all trained combat magicians. Their leader crashed to a halt right in front of me and tilted his head back the better to look down his nose at me.

Jimmy Hadleigh, the professional snob, had a lot of nose to look down, and cold blue eyes that surely only the truly unkind would point out were just that little bit too close together. Otherwise handsome, with jet-black hair, his mouth came with a built-in sneer. He wore a splendidly cut suit, and smart grey gloves, so he wouldn't get his hands dirty. We knew each other. In passing. We'd never got on, partly because he considered himself an authority figure, and mostly because I considered him an overbearing little shit. Walker must be really upset with me if he'd unleashed Jimmy Hadleigh and his dogs. He looked at Sinner, Pretty Poison, and Madman, and dismissed them all with one flick of a perfect eyebrow.