There was a sleek, expensive, black town car parked on the street outside Murphy’s home, its tires on the curbside resting in several inches of snow. It couldn’t have looked more out of place in the middle-class neighborhood if it had been a Saint Patrick’s Day Parade float, complete with prancing leprechauns.

Sir Stuart looked at me and then out at our surroundings, frowning. “What is it, Dresden?”

“That car shouldn’t be there,” I said.

Mort glanced at me and I pointed out the black town car. He studied it for a moment before he said, “Yeah. Kind of odd on a block like this.”

“Why?” asked Sir Stuart. “It is an automatic coach, is it not?”

“An expensive one,” I said. “You don’t park those on the street in weather like this. The salt-and-plow truck comes by, and you’re looking at damage to the finish and paint. Keep going by, Morty. Circle the block.”

“Yeah, yeah,” Mort said, his tone annoyed. “I’m not an idiot.”

“Stay with him,” I told Sir Stuart.

Then I took a deep breath, remembered that I was an incorporeal spirit, and put my feet down through the floorboards of the car. I dug in my heels on the snowy street as the solid matter of the vehicle passed through me in a cloud of uncomfortable tingles. I’d meant to simply remain behind, standing, when the car had passed completely through me. I hadn’t thought about things like momentum and velocity, and instead I went into a tumble that ended with me making a whump sound as I hit a soft snowbank beside the home next to Murphy’s. It hurt, and I pushed myself out of the snowbank, my teeth chattering, my body blanketed in cold.

“N-n-no, H-Harry,” I told myself firmly, squeezing my eyes shut. “Th-that’s an illusion. Your mind created it to match what it knows. But you didn’t hit the snowbank. You can’t. And you can’t be covered in snow. And therefore you can’t be wet and cold.”

I focused on the words, putting my will behind them, in the same way I would have to attract the attention of a ghost or spirit. I opened my eyes.

The snow clinging to my body and clothes was gone. I was standing, dry and wrapped in my leather duster, beside the snowbank.

“Okay,” I said. “That’s bordering on cool.”

I stuck my hands in my pockets, ignored the snow and the steady, gentle northern wind, and trudged across Grandma Murphy’s rose garden to Murphy’s door. I raised my hand and knocked as I’d done so often before.

A couple of things happened.

First, my hand stopped above the door, close enough that you could have slid one or two pieces of paper between my knuckles and the wood, but definitely not three. There was a dull, low thud of solid impact, even though I hadn’t touched the door itself. Second, light flashed, and something like a current of electricity swarmed up my arm and down my spine, throwing my body into a convulsion that left me lying on the ground, stunned.