The Brotherhood of Shadows runs through the flagship novelThe Brotherhood of Shadows isn't just world-building texture — it's UNEARTH's Dr. Amara Kess's own faction (which she betrays), it runs Cutthroat as a deep-cover asset in Dark Cell, and its Scholar Wing is name-checked in the setting guide as the only archive that predates BAFO. One quiet organization, load-bearing in three separate stories.