Great, Barnes and Noble, that puts this anywhere between probably the 1950s at the earliest, judging by this elevator, and... well, really, anywhen after that point, and probably anywhere too. Not actually super helpful.

"Right. I'm decently sure I'm not in your head, and that yes, this is indeed real," he confirms. "Not that I'm in any position to give guarantees. So, if this is real, why did that man just disappear? Where did he go. And I'm genuinely asking you here, because I have no idea, and you barely seemed to notice."