Maybe try to detect or feel if the person in front of you is really a nice person or if he’s faking it.
The last HR guy I met was so nice to me and enthusiastic that it was really suspicious. I had met real psychopaths before and I was careful. But in the end, he really wanted to take care of the coworkers, and it took me one whole month to understand this.
Having a “library” is already a crime in some countries so…