Zira took the key, and held it in a trembling hand. He wasn't generally prone to human emotion, but knowing what lay in wait on the other side of the door, he simply couldn't help himself. He was excited, and a little bit nervous.
He pressed the key into the lock, and felt a little thrill at the click, as the lock gave way. He looked back to the demon's face behind him, as though he needed the encouragement. Turning his attention to the door once more, he slowly pushed it forward, an unnecessary breath catching in his throat as the door swung out wide, revealing what appeared to be endless rows of musty books, very old, some nearly as old as Man himself.
"Oh my," he murmured, forgetting Crowley entirely as he stepped forward.