This book sound interesting and kind of correct about people.
The one annoying thing that I run into when I talked to other people is that it is quite frequently think they could "read" you when they simply don't or can't.
I have one friend that told me that he "understand me more than I understand myself". What I heard is that he prefer his own perception of me than really want to get to know me. And he think that his perception of me is more accurate than my own understanding of myself.
This short video would tell you otherwise.
I don't pretend I understand people. I don't. I only approach a friend and ask about him or her or them and let them tell what's going on in their minds themselves.
I trust their analysis more than perception, until there is evidence that the person is not truthful.