The Citadel of Chaos

You enter a room which is evidently a library of some sort.
Books stretch from ceiling to floor on each wall and
several tables and chairs are lined down the centre of the room.
At the far end sits a dark-skinned man
who looks up at you from a book over narrow eyeglasses.
Behind him is a door.
'Yes, what is it?' he snaps.
'Which book are you looking for?'
You scan the various shelves, which are labelled.

Will you ask him for:

Biographies of Balthus Dire ?

Secrets of the Black Tower ?

Creatures of the Kingdom of Craggen Rock ?