“Seriously in need of a body cast and a therapist, more like.” I raked at my too-long, too-messy hair with my fingers, thinking. “So on Halloween, they’re here? All of them?”

“Any who are . . . The only word I can come close with is ‘awake.’ Immortals aren’t always moving through the time stream at the same rate as the universe. From where you stand, it looks like they’re dormant. They aren’t. You just can’t perceive the true state of their existence properly.”

“They’re here,” I said slowly. “Feeding and swindling one another for little bits of power.”

“Right.”

“They’re trick-or-treating?”

“Duh,” Bob said. “Where do you think that comes from?”

“Ugh, this whole time? That is creepy beyond belief,” I said.

“I think it was the second or third Merlin of the White Council who engineered the whole Halloween custom. That’s the real reason people started wearing masks on that night, back in the day. It was so that any hungry immortal who came by might—might—think twice before gobbling someone up. After all, they could never be sure the person behind the mask wasn’t another immortal, setting them up.”

“Halloween is tomorrow night,” I said. A bank sign I was passing told me it was a bit after two a.m. “Or tonight, I guess, technically.”

“What a coincidence,” Bob said. “Happy birthday, by the way. I didn’t get you anything.”

Except maybe my life. “’S okay. I’m kinda birthdayed out already.” I rubbed at my jaw. “So . . . if I can get to Maeve on Halloween night, I can kill her.”

“Well,” Bob hedged. “You can try, anyway. It’s technically possible. It doesn’t mean you’re strong enough to do it.”

“How big a window do I have? When does Halloween night end?” I asked.

“At the first natural morning birdsong,” Bob replied promptly. “Songbirds, rooster, whatever. They start to sing, the night ends.”

“Oh, good. A deadline.” I narrowed my eyes, thinking. “Gives me a bit more than twenty-four hours, then,” I muttered. “And all I have to do is find her, when she can be anywhere in the world or the Nevernever, then get her here, then beat her down, all without her escaping or killing me first. Simple.”

“Yep. Almost impossible, but simple. And at least you know the when and the how,” Bob said.

“But I’m no closer to why.”

“Can’t help you there, boss,” the skull said. “I’m a spirit of intellect, and the premise we’re dealing with makes no sense.”

“Why not?”

“Because there’s no reason for it,” Bob said, his tone unhappy. “I mean, when Maeve dies, there will just be another Maeve.”

I frowned. “What do you mean?”

Bob sighed. “You keep thinking of the Faerie Queens as specific individuals, Harry,” Bob said. “But they aren’t individuals. They’re mantles of power, roles, positions. The person in them is basically an interchangeable part.”

“What, like being the Winter Knight is?”

“Exactly like that,” Bob said. “When you killed Slate, the power, the mantle, just transferred over to you. It’s the same for the Queens of Faerie. Maeve wears the mantle of the Winter Lady. Kill her, and you’ll just get a new Winter Lady.”

“Maybe that’s what Mab wants,” I said.

“Doesn’t track,” Bob said.

“Why not?” I asked.

“Because the mantle changes whoever wears it.”

My guts felt suddenly cold.

(I’m not Lloyd Slate.)

(Neither was he. Not at first.)

“Doesn’t matter who it is,” Bob prattled on. “Over time, it changes them. Somewhere down the line, you wouldn’t be able to find much difference between Maeve and her successor. Meet the new Maeve. Same as the old Maeve.”

I swallowed. “So . . . so Lily, who took the Summer Lady’s mantle after I killed Aurora . . .”

“It’s been what? Ten years or so? She’s gone by now, or getting there,” Bob said. “Give it another decade or two, tops, and she might as well be Aurora.”

I was quiet for a moment. Then I asked, “Is that going to happen to me, too?”

Bob hedged. “You’ve . . . probably felt it starting. Um, strong impulses. Intense emotions. That kind of thing. It builds. And it doesn’t stop.” He managed to give the impression of a wince. “Sorry, boss.”

I stared at my knuckles for a moment. “So,” I said, “even if I frag this Maeve, another one steps up. Maybe not for decades, but she does.”

“Immortals don’t really care about decades, boss,” Bob said. “To them, it’s like a few weeks are to you.”

I nodded thoughtfully. “Then maybe it’s about the timing.”

“How so?”

I shrugged. “Hell if I know, but it’s the only thing I can think of. Maybe Mab wants a less Maeve-ish Maeve for the next few years.”

“Why?” Bob asked.

I growled. “I already have one why. I don’t need you adding more.” I drummed my fingers on the steering wheel. “Why doesn’t Mab do it herself?”

“Oh, I see. It’s okay if you add more whys. You have complicated rules, Harry.”

I ignored that with the disdain it deserved. “I’m serious. Mab has the power. What’s stopping her from tearing Maeve to shreds?”

“Something?” Bob suggested.

“I can’t believe I got my tux shredded for brilliant analysis like that,” I said.

“Hey!” Bob said. “I just told you something so valuable that it could save your life! Or get you killed!”

“Yeah.” I sighed. “You did. But it isn’t enough. I need more information.”

“You do know a few people around here,” Bob said.

I growled. “My physical therapist, who I’ve known for three whole months, nearly died tonight because she showed up at a party with me—and that was with Mab looking over my shoulder as a referee.”

“How is that any different from the last time you played with faeries?”

“Because now I know them,” I said. It was actually sort of scary looking back at the me from a decade ago. That guy was terrifying in his ignorance. “Aurora and her crew were basically a decent crowd. Misguided, yeah. But to them, we were the bad guys. They were tough, but they weren’t killers. Maeve’s different.”

“How?” Bob asked.

“She doesn’t have limits,” I said.

“And you figure you’re up against her.”

“I know I am,” I said. “And she’s grown powerful enough to challenge Mab in her own court. I also know more about Mab now, and all of it scares the crap out of me.” I snorted, and felt a tremble of winged insects in my midsection. “And apparently Maeve is a threat to her. And I’m supposed to deal with it.”

Bob whistled. “Well. Maybe that explains it.”

“Explains what?”

“Why Mab was so hell-bent on getting you to be the new Knight,” Bob said. “I mean, you’re kind of an avatar of the phrase ‘Things fall apart.’ Mab has a target she wants to be absolutely sure of. You’re like . . . her guided missile. She can’t know exactly what’s going to happen, but she knows there’s going to be a great big boom.”