I stared at the candle for a second. Then muttered, to myself, "Why did I have to work to make that thing light up?"

"Probably because the Nightmare took a big bite out of your powers, Harry."

I turned around, very slowly, to blink at Bob. "It … it did what?"

"When it attacked you, in your dream, did it go after a specific place on your body?"

I put my hand to the base of my stomach, pressing there, and felt my eyes go wide.

Bob winced. "Oooooo, chakra point. That isn't good. Got you right in the chi."

"Bob," I whispered.

"Good thing he didn't go after your mojo though, right? I mean, you have to look on the bright side of these—"

"Bob," I said, louder. "Are you saying it … it ate my magic?"

Bob got a defensive look on his face. "Not all of it. I woke you up as quick as I could. Harry, don't worry about it, you'll heal. Sure, you might be down for a couple of months. Or, um, years. Well, decades, possibly, but that's only a very outside chance—"

I cut him off with a slash of my hand. "He ate part of my power," I said. "Does that mean that the Nightmare is stronger?"

"Well, naturally, Harry. You are what you eat."

"Dammit," I snarled, pressing one hand against my forehead. "Okay, okay. We've really got to find this thing now." I started pacing back and forth. "If it's using my power, it makes me responsible for what it does with it."

Bob scoffed. "Harry, that's irrational."

I shot him a look. "That doesn't make it any less true," I snapped.

"Okay," Bob said, meekly. "We have now left Reason and Sanity Junction. Next stop, Looneyville."

"Grrrr," I said, still pacing. "We have to figure out where this thing is going to hit next. It's got all night to move."

"Six hours, thirteen minutes," Bob corrected me. "Shouldn't be hard. I've been reading those journals you got from the ectomancer, while you were sleeping. The thing can show up in nightmares, but there's going to be commonality between all of it. Ghosts can only have the kind of power this Nightmare has while they are acting within the parameters of their specific bailiwick."

"Baili-what?"

"Look at it this way, Harry. A ghost can only affect something that relates directly to its death somehow. Agatha Hagglethorn couldn't have terrorized a Cubs game. That wasn't where her power was. She could mess with infants, with abusive husbands, maybe with abused wives—"

"And meddling wizards," I mumbled.

"You put yourself in the line of fire, sure," Bob said. "But Agatha couldn't just run somewhere willy-nilly and wreak havoc."

"The Nightmare's got to have a personal beef in this," I said. "That's what you're saying."

"Well. It has to be related to its demise, somehow. So, yeah. I guess that is what I'm saying. More specifically, it's what Mort Lindquist was saying, in his journals."

"Me," I said. "And Lydia. And Mickey Malone. How the hell do all of those relate? I never saw Lydia before in my life." I frowned. "At least, I don't think I have."

"She's kind of an oddball," Bob agreed. "Leave her out of the equation for a minute?"

I did, and it came to me as clearly as a beam of sunlight. "Dammit," I said. I turned and ran toward the stairs on my unsteady legs, started hauling myself up them and toward the phone.

"What?" Bob called after me. "Harry, what?"

"If that thing is the demon's ghost, I know what it wants. Payback. It's after the people that took it down." I yelled back down the stairs, "I've got to find Murphy."

Chapter Nineteen

There's a kind of mathematics that goes along with saving people's lives. You find yourself running the figures without even realizing it, like a medic on a battlefield. This patient has no chance of surviving. That one does, but only if you let a third die.

For me, the equation broke down into fairly simple elements. The demon, hungry for its revenge, would come after those who had struck it down. The ghost would only remember those who had been there, whom it had focused on in those last moments. That meant that Murphy and Michael would be its remaining targets. Michael had a chance of protecting himself against the thing—hell, maybe a better chance than me. Murphy didn't.

I got on the phone to Murphy's place. No answer. I called the office, and she answered with a fatigue-blurred, "Murphy."

"Murph," I said. "Look, I need you to trust me on this one. I'm coming down there and I'll be there in about twenty minutes. You could be in danger. Stay where you are and stay awake until I get to you."

"Harry?" Murphy asked. I could hear her starting to scowl. "You telling me you're going to be late?"

"Late? No, dammit. Look, just do what I said, all right?"

"I do not appreciate this crap, Dresden," Murphy growled. "I haven't slept in two days. You told me you'd be here in ten minutes, and I told you I'd wait."

"Twenty. I said twenty minutes, Murph."

I could feel her glare over the phone. "Don't be an asshole, Harry. That's not what you said five minutes ago. If this is some kind of joke, I am not amused."

I blinked, and a cold feeling settled into my gut, into the hollow place the Nightmare had torn out of me. The phone line snapped, crackled, and popped, and I struggled to calm down before the connection went out. "Wait, Murphy. Are you saying you talked to me five minutes ago?"

"I am about two seconds short of killing the next thing that pisses me off, Harry. And everything keeping me out of bed is pissing me off. Don't get added to the list." She hung up on me.

"Dammit!" I yelled. I hung up the phone and dialed Murphy's number again, but only got a busy signal.

Something had talked to Murphy and convinced her she was talking to me. The list of things that could put on someone else's face was awfully long, but the probabilities were limited: either another supernatural beastie had wandered onto the stage or, I gulped, the Nightmare had taken a big enough bite of me that it could put on a convincing charade.

Ghosts could take material form, after all—if they had the power to form a new shape out of material from the Nevernever, and if they were familiar enough with the shape. The Nightmare had eaten a bunch of my magic. It had the power it needed. And it had the familiarity it needed.

Hell's bells, it was pretending to be me.

I hung up the phone and tore around the house frantically, collecting car keys and putting together an improvised exorcism kit from stuff in my kitchen: Salt, a wooden spoon, a table knife, a couple of storm candles and matches, and a coffee cup. I stuffed them all into an old Scooby-Doo lunch box, then, as an afterthought, reached into a bag of sand that I keep in the kitchen closet for Mister's litter box, and tossed a handful into a plastic bag. I added the scorched staff and blasting rod to the accumulating pile of junk in my arms. Then I ran for the door.

I hesitated, though. Then went to the phone and dialed Michael's number, fingers dancing over the rotary. It was also busy. I let out a shriek of purest frustration, slammed down the phone, and ran out the door to the Blue Beetle.

It was late. Traffic could have been worse. I got there in less than the twenty minutes I'd promised Murphy and parked the car in one of the visitor's parking spaces.

The district station Murphy worked in crouched down amongst taller buildings that surrounded it, solid and square and a bit battered, like a tough old sergeant amongst a forest of tall, young recruits. I ran up the stairs, taking my blasting rod with me, with my Scooby-Doo lunch box in my right hand.

The grizzled old sergeant behind the desk blinked at me as I came panting through the doorway. "Dresden?"