Her own name.

The bookbinder leaned closer. “The missing book isn’t a history of subcreation. It is the act of subcreation. Every person who dreams of a world leaves a trace of it in this book. Your name has been in it for years, Dr. Venn. You just never noticed.”

The bookbinder, a woman with runic tattoos on her knuckles, didn’t look up. “It’s not for sale. It’s not even real.”

The problem was, no “C. Venn” had ever taught at Oxford. Clarendon Press had no record of the title. WorldCat, the library of libraries, returned only a single, baffling entry: Location: Private Collection, Reykjavík. Status: Unknown.