It wasn't the word itself, but the typeface. It was sleek, sans-serif, with a distinctive, almost arrogant slant to its lowercase 'g'—a font she knew intimately. She had used it that morning to type a grocery list. It was Calibri .

She tried to scream, but the sound that left her mouth wasn't her voice. It was a crisp, clean, digital ding—the sound a computer makes when a document has been successfully saved.

But as she leafed past faded Gothic scripts and spidery Italics, a single word on a brittle page made her blood run cold.

Calibri, designed in 2004 by Lucas de Groot. It could not, by any law of physics or history, exist on a page dated 1687.

The lead plate shimmered. New text etched itself, letter by letter, in that hatefully clean, slanting typeface. "WE DO. AND YOU ARE NOW A CORRUPTED FILE. GOODBYE, DR. VANCE." Her laptop screen flickered. The file system began to corrupt. Her photos, her research, her own name on her faculty ID—all of it dissolved into gibberish, replaced by repeating, cascading lines of one word: