"In this revelatory, authoritative portrait of Donald J. Trump and the toxic family that made him, Mary L. Trump, a trained clinical psychologist and Donald’s only niece, shines a bright light on the dark history of their family in order to explain how her uncle became the man who now threatens the world’s health, economic security, and social fabric."
Appears from Amazon write-up about the book, this is about family interactions rather than focused only on money. She has the education to know human behavior. I haven't looked at her professional life, but will do that.