In the early 20th century, Drummond’s ancestor Edmund Fox buys a mansion to house his books. He hears of a magical book that opens doors to anywhere and begins searching for it. He and his friends form a group called the Fox Library, devoted to gathering magical books. Shortly before Edmund’s death, the group finds their first one: the Book of Shadows. Seeing it as a validation of their belief, the group continues searching for more. Years later, Drummond becomes the Librarian in charge of looking after the collection. After his friends are killed by the Woman, Drummond uses the Book of Shadows to hide the Fox Library. Now, it can only be entered by the Book of Doors.

Cassie, Izzy, and Drummond emerge in Lyon. They go to a cafe for breakfast, and Drummond tells them about Hugo Barbary. Cassie is in a state of shock, horrified by Barbary’s violence. They discuss the magic books, though much of their history is a mystery. Izzy tells them she Googled the Book of Doors, and Drummond expresses concern that she may have tipped off other collectors.