Unseen City by Amy Shearn
Meg Rhys is a textbook example of a “spinster librarian”. In her forties, she spends most of her time in the local history stacks of the Brooklyn Public Library, and the rest of the time living hermetically in her apartment with her dead sister’s cat and her dead sister’s ghost, staunchly resistant to any suggestions of change. Enter Ellis Williams, a charming library patron seeking assistance in figuring out whether his family’s home might have a ghost of its own.