The author of this book, Mary Trump is certainly qualified to write it. She has a PhD in Psychology and is also the niece of President Trump. Having said that, does she do justification to the sub title, "How my family created the world's most dangerous man?" I don't think so. Mary outlines the dysfunctional nature of her father's family and how it might have helped Donald Trump become the narcissistic sociopath that he is. But for the most part the book deals with how badly her father was treated by her grandfather and later by how she, her brother, and her mother, were disinherited. In doing so she loses her credibility as a Donald Trump biographer and instead appears to be making a case for herself. She could have done a much better job.