I gave the potion a few seconds to work and shifted my hands on the handle of my wizard's staff. Even though the end of it was shoved into a wheeled bucket, it still didn't look much like the handle of a mop. And even though I was dressed in the dark blue coveralls, they were ridiculously short on me. I did not look much like a janitor.

That's where the magic came in. If the potion worked, I would look like background to any casual observers, a part of the scenery that they wouldn't glance at twice. So long as they didn't give me an intense scrutiny, the potion's power should be able to keep me from being noticed, which would let me get close to MacFinn, which would let me put the containment circle around him and keep his transformed self from going on a rampage.

Of course, if it didn't work, I might just end up studying the inside of a jail cell for a few years—provided the transformed MacFinn didn't tear me apart first.

I tried to ignore the pain in my shoulder, the nervous tension in my stomach. I was rebandaged, Tylenoled, and as reasonably refreshed as I could possibly have been without drinking the potion I had brewed just for that purpose.

If I could have had both potions going in my system without them making me too ill to move, I would have downed the refresher potion the moment I got my hands on it, but without the blending potion, there was no way I could get inside to MacFinn. I could only hope that I'd find a use for it eventually. I'd hate the effort to go to waste.

I waited impatiently in the rain, sure for a moment that I had messed something up when making the potion, that it wasn't going to have any effect at all.

And then I felt it start to work.

A sort of grey feeling came over me, and I realized with a start that the colors were fading from my vision. A sort of listless feeling came over me, a lassitude that advised me to sit down somewhere and watch the world go by, but at the same time the hairs on the back of my neck prickled up as the potion's magic took effect.

I took a deep breath and walked up the stairs of the building with my bucket and my "mop," pulled open the doors, and went inside. Shadows shifted and changed oddly, all greys and blacks and whites, and for a second I felt like an extra on the set of Casablanca or The Maltese Falcon.

The solid old matron of a sergeant sat at the front desk, thumbing through a glossy magazine, a portrait done in colorless hues. She glanced up at me for a second, and tinges of color returned to her uniform, her cheeks, and her eyes. She looked me over casually, sniffed, and lowered her face to her magazine again. As her attention faded, so did the colors from her clothing and skin. My perceptions of her changed as she paid attention to me or did not.

I felt my face stretch in a victorious smile. The potion had worked. I was inside. I had to suppress an urge to break into a soft-shoe routine. Sometimes, being able to use magic was so cool. I almost stopped hurting for a few seconds, from sheer enjoyment of the special effects. I would have to remember to tell Bob how much I liked the way this potion worked.

I kept my head down and moved past the desk sergeant, just one more janitor coming in to clean up the police station after hours. I picked up the bucket and my «mop» and went up the stairs, toward the holding cells and the Special Investigations offices on the fifth floor. One cop passed me on the stairs and didn't so much as look at me. His uniform and skin remained entirely devoid of color. I grew more confident and moved with more speed. I was effectively invisible.

Now all I had to do was find MacFinn, trick my way into seeing him, and save Murphy and all the other police from the monster MacFinn would become—before they arrested me for trying to do it.

And time was running out.

Ever wish you had an almanac?

I did, that night. I had no idea what time the moon was supposed to rise, and I hadn't exactly had time to run to the library or a bookstore. I knew that it was supposed to happen an hour or so after sundown, but the way the clouds rolled in had made it uncertain exactly when sundown had happened. Did I have twenty minutes? Ten? An hour?

Or was I already too late?

As I climbed the stairs, I thought about being alone in the building with MacFinn after he had changed. For all my vaunted wizard's knowledge, I had no real idea of his capabilities; although after seeing Kim's body, I had something of an idea of what he could do. Bob had said that loup-garou were fast, strong, virtually immune to magic. What could I do against something like that?

I just had to pray that I would be able to get the circle up around MacFinn before I had to find out. I checked the bucket, to make sure I still had the chalk and the stones I would need to construct the greater circle around MacFinn. You didn't necessarily have to make them out of silver and gold and whatnot. Mostly, you just had to understand how the construct channeled the forces that were being employed. If you knew that, you could figure out how to make it out of less pure materials. The very best wizards don't need much more than chalk, table salt, and a wooden spoon to pull off some remarkable stuff.

My thoughts were rambling now, panic making them scamper around like a frightened chipmunk. That was bad. I needed focus, direction, concentration. I drove my legs a little harder, went up the stairs as fast as I dared, until I came out on the fifth floor. The door to Special Investigations was ten feet away down the hall. The holding cells were down the hall and around the corner, and I started that way at once.

"What do you mean, you can't find him?" Murphy's voice demanded as I walked past the office door.

"Just that. The men on his apartment said that they kept a real good eye on the place, but that he got in and out again without them seeing anything." Carmichael's voice was tired, frustrated.

Murphy snorted. "Christ, Carmichael. Is Dresden going to have to walk right into the office before you can find him?"

I hurried on past the door and down the hall. Tempting as it was to listen to a conversation about myself without the participants knowing, I just didn't have time. I wheeled my wobbling, squeaking bucket down the hall, half jogging in my hurry.

Holding was set up, unsurprisingly, behind bars. There was a swinging barred door that the station guard had to buzz to open, if you didn't have the key. Beyond that was a sort of antechamber with a couple of wooden chairs and not much else besides a counter with a window made of bullet-proof glass. The jailer sat behind the glass at his desk, his expression baggy eyed and bored. Past the jailer's window was another door, made of steel with a tiny little window, which led into the row of cells. The jailer had the controls to that door at his desk as well.

I went to the first barred door, kept my head down, and rapped on the metal slats. I waited for a while, but nothing happened, so I rapped on the bars again. It occurred to me that it would add a nice touch of irony if the same blending potion that got me into the building also kept me from being noticed by the jailer and let inside. I rapped on the bars again, harder this time, with the shaft of my wooden "mop."

It took some determined rapping to get him to look up from his magazine, but he finally did, and peered at me through thick glasses. His colors swirled and gained a bit of tint before settling back toward grey. He frowned at me, glanced back at a calendar on the wall, and then pushed the button.

The barred door buzzed and I shoved it open with my bucket, wheeling inside with my head down. "You're early this week," the jailer said, his eyes back on the magazine.