A patron I don't recognize comes up to the desk, shows me a piece of paper, and asks, "Where would this number be?" It's 616--I recognize it as medical but don't know the specifics. I describe where that section is, but, seeing the look on his face, I offer to walk him back there and he accepts.
On our way, we run into one of the regulars and the two guys greet each other, "Heyyy, Jimmy, long time no see!" Jimmy (new guy) has just returned from the area's middle-of-nowhere mega-casino and recounts that he almost won $777. He did win $100, though! Where's he staying right now? How'd he get down to the casino? He's staying at one of the local homeless shelters. The two guys talk for a little bit about the renovation and reorg that is going on there, then we get to Jimmy's call number--psychopathology and sociopathology.
"I'm revisiting my old boss!" he says. He has a call number but not an author written down and there are three books at that number. He asks for my help in picking one out:
Me: They say don't judge a book by its cover, but I think that's bad advice. Looking at these, it looks like this one is more about how to deal with people like that in your everyday life, and this one is more about the science behind it.
Jimmy: I'll take the how to.
Me: The good thing about the library is that the books are free! You can always take them both!
He sticks to his original choice and leaves happily with The Sociopath at the Breakfast Table : Recognizing and Dealing with Antisocial and Manipulative People.