https://www.amazon.com/Six-Pillars-Self-Esteem-Definitive-Leading/dp/0553374397
It's a book on self-esteem; not the meaningless concept that it has come to be--the artificial inflation of the ego--but rather developing a sense of inner strength, a rational admission of one's own strengths and weaknesses, and a confidence in one's own ability to deal with challenges and uncertainty.
My wife and daughter struggle with anxiety. We're reading this book now, and it's a very worthwhile read (although it's somewhat dense).