Right now you are in front of the red chair, turn back you can find a table with books on it, now go straight, you will find three rooms, now enter into the middle room and keep moving forward, now you will find a round table in the middle of the room, now turn left and keep moving forward, you will find stair case, on the left side you will find a door and a small corridor, stand in front of it, that will be your final destination.