A few of mine:
Influence - Robert Cialdini
Describes simple techniques that can greatly influence people’s behavior. Understanding these brings awareness to how people are trying to manipulate you.
Art of Invisibility - Kevin Mitnick
Describes how hard it is to be truly anonymous today and how easy it is to track people. I think everyone deserves to know how much they are being spied on.
Everyone should probably read the most popular religious text in their region to better understand the culture around them.