Tracking Adam down was easier said than done, and Castiel didn't have the time to keep a vigilant watch on his room, so this truly was all thanks to luck, for whatever that was worth.

Castiel had been tasked with examining Adam back at Thanksgiving, and he hadn't gotten around to it until now, so he wasn't prepared to take no for an answer.

Curious as he was to see what book Adam was looking for, Castiel did what he could to not direct his gaze that way. At this point, he couldn't afford to get distracted.

"I'm not here about Dean," he said with a shake of his head. He couldn't even deny that it was a fair assumption on Adam's part, so instead he moved right past it. "But he did tell me that Michael... did something to you. He asked me to look into it."

Adam was clearly well enough to come out to the library on his own, but that didn't mean that he was completely safe.