Princess
I have used Scott Pecks books for ongoing growth..and agree that People of the Lie is excellent.
The Different Drum likewise...and as a source for counselling study along with Carl Rogers and Eric Berne Scott Peck is a great source.
But in everyday interaction and my own wellbeing I believe Scott Peck has been my guru..
As for the facial expressions noted in the first mentioned book I agree and add that the colour of complexion can give show inheld trauma when speaking to a troubled person.
Just as "The teacher appears when the student is ready" I seem to find books in my own journey in an amazing way..

Elisabeth Kulber Ross as a model is another good friend to me and of course C.S.Lewis
Books and more books...my good friends.
Mountain ash