It's taking forever to update.
It's about a human boy who looks like a vampire (white hair and red eyes) who signed up for a part-time job in a library. This library happends to be lead by a group of real vampires who act llike some kind of screws/guards of prisoners. Prisoners are locked up in a different dimension. There is a portal in books to acces the prison.
Read ch. 40
Vampire Library