"Uh, yeah. The Men of Letters' bunker. It was mostly warded and dug in long before we got there."

Not that Sam and Dean hadn't done some extra wardings of their own. After all, they'd learned more on the job than most of the Men of Letters had ever learned in just their studies. "We're probably better prepared than they were, though."

He smiles, shaking his head. "It took time. Dean took to it immediately. I...I spent a long time thinking it was just another place for us to work. But I've grown more accustomed to the place."