I'm wondering if that's her library at Kanemasa, or if it's possibly the collection that was in the warehouse where her parents hid her? I like that the books are more of the kind that can teach you about the world around you, rather than the typical vampire classics like Dracula or 19th century romances; it shows that she's not merely an archetype.
Yeah I forgot about that part of Salem's Lot! I think there's a part there when the head vamp convinces a priest that his holy items hold no meaning...and then breaks the cross.
I wonder why Ono didn't pursue this further? It could've made some cool plot twists!

Ohh, I thought you meant that the tunnel has holy objects stored down there or something, I was like...how did I miss that?!
It was probably a chance for Ozaki to look badass. "There's nothing to fear but fear itself."