“He locked the book. Most holy books are locked, actually.” Given how violent humans could get over matters of religion, this was one of the few things almost every Porter agreed on. “Basically, he seals the text, preventing anyone from using its magic. Libriomancy works through the resonance among copies of a book. Locking one seals them all, and the original, locked copy goes to one of our archives.”

“Is it something they do often?”

“Often enough. It’s getting harder to keep up with new titles these days. Catalogers flag potentially dangerous books. Take David Brin’s Earth. He wrote about a microscopic black hole that fell into the planet’s core, threatening to devour the entire world. That black hole would be small enough to fit through the pages, meaning any fool kid with magical talent who didn’t know better . . .”

“Would it really destroy the Earth?”

“It’s tough to say. The amount of energy it would take to create a black hole, even a pinpoint one, is immense. It might just swallow the kid and pop back out of existence, but in theory, it could also become self-sustaining as it devoured more mass.” There were plans upon plans for such world-threatening eventualities, developed by Porter researchers. “We get review copies of every new book from the major publishers and most of the small presses. We usually catch and lock the troublesome ones before they’re released to the public, though Harry Potter gave us some trouble.”

J. K. Rowling had received a visit from Gutenberg himself, asking her to eliminate that damned time-turner from future books. Before I could say more, Smudge scrambled off of the dashboard and onto the steering wheel. Heat rippled from his back as he spun around to glare at the windshield.

“What’s wrong?” asked Lena.

The windshield began to fog over, gray wisps creeping inward from the edge. “Not now, dammit.”

We were more than halfway across, but that left another two miles to go. Keeping one white-knuckled hand on the wheel, I reached out to try to wipe the windshield clean. My efforts had no effect. This wasn’t frost; it was smoke, trapped within the windshield itself.

“Vampires?” Lena asked.

“Phone call.” I flipped on the emergency blinkers. The driver behind me honked the horn, making me jump. “The windshield is crystal, not glass.”

Smoke condensed into a young, translucent face with an arrogant smirk. I already knew who it was. Only one person could seize control of the car like that: the same person who had enchanted it to begin with.

“I’m in the middle of the goddamned Mackinac Bridge!” I shouted.

The image vanished, reappearing as a much smaller face in the rearview mirror. “Isaac, my friend. So glad to find you alive and well. I hear you’re having an interesting week.”