Start with high-confidence personality books, then narrow by subgenre or adjacent topics.
The Better Angels of Our Nature
Steven Pinker, Arthur Morey
The Gift of Not Belonging
Rami Kaminski MD MD, Neil Hellegers
Delivered From Distraction
Edward M. Hallowell, John J. Ratey
The Discovery of Being
Rollo May
Leaders and Their Followers in a Dangerous World
Jerrold M. Post, Alexander George
Surrounded by Idiots Revised & Expanded Edition
Thomas Erikson
AIDS Trauma and Support Group Therapy
Martha A. Gabriel
Think Again
Adam Grant, Adam M. Grant
Optimism
Helen Keller