What are some books everyone should read and why?

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.