I really enjoy when an inanimate  object is a very big character to the story and this one is a library... Perfect gothic vibes here!

Ivy inherits a house from a very distant relative and when she goes to claim it, the few servants try to warn her off. But she stays and soon becomes enamored with the library. But she feels the darkness in the house, starts to forget things, and "invites" a man into her life with dark consequences.

This book has a very dark mood/feel to it. The ties that people have to the house and what the library takes from its tenets is otherworldly and so unrealistic but it really works for the story.