- "It's like primal therapy for people who are about to move on. You go in, unload your bullshit, and it lightens your conscience."
Secrets Taken To The Grave is a division of the Underworld branch of the Library of the Neitherlands that helps souls prepare to move on to the afterlife.
- "It's some weid research division that the Library made in partnership with the people who run the Underworld. Librarians like us aren't even allowed to go in there."
- ―Sylvia to Penny
Secrets Taken To The Grave was founded in a partnership between the Order of the Library of the Neitherlands and the gods who run the Underworld to help souls transition into the afterlife.