Below are the books that I have found most helpful over the years. Synopses of them can be found here:
thejimpaul.com/wp-content/non...
7 Habits of Highly Effective People, Stephen Covey
Conversation Skill, Stanford Study
The Four Agreements, Don Miguel Ruiz
Life is a Series of Presentations, Tony Jeary
7 Helpful Tips to Increase Confidence, Kent Sayre
The Road Less Traveled, Scott Peck
How to Win Friends and Influence People, Dale Carnegie
Men Are from Mars, Women Are from Venus, John Gray
Your Body Language Shapes Who You Are, Amy Cuddy TED talk
Factors for Happiness, Study synopsis
A New Earth, Awakening to Your Life's Purpose, Ekhart Tolle
12 Rules for Life - Jordan Peterson
What They Don't Teach You at Harvard Business School - McCormack
( I did not write the synopses. I copied them from other sources)