One thing you notice very quickly in the library, is that things are concealed. For instance, the desk that Harriet sat behind looked like a pile of books. And now as we both climbed the staircase to the apartment, I'm walking up steps that are made entirely from books!

Even when we reach the top, the entrance to the apartment is blocked by books, or is it? Harriet reaches out towards the fully stacked bookcase and folds it back like a curtain. An illusion created by the library to make it look like a bookshelf.

We stepped through the curtain and into a rather cosy sitting room. Ahead of me was a fireplace fully ablaze. Either side of the fireplace were two light brown coloured high backed leather chairs. A small table drapped with a tablecloth sat between them. Upon the table stood a steaming pot of tea and a plate of chocolate biscuits all ready for us.

"The library...