That was updated and expanded.
https://us.macmillan.com/books/9781250212863/thedangerouscaseofdonaldtrump
In September 2022, The Divider: Trump in the White House, 2017-2021 by journalists Peter Baker and Susan Glasser of The New York Times and The New Yorker respectively, reported that John F. Kelly had secretly purchased the book when he was Trump's chief of staff from July 2017 to January 2019. According to the authors, who interviewed Kelly for the book, he considered the book helpful in dealing with Trump, whom he considered to be insecure, egotistical, and a pathological liar.
He is much worse now.
https://www.express.co.uk/news/us/1889547/donald-trump-mental-state-court-cases-hush-money
EXCLUSIVE: A psychiatrist who has claimed Donald Trump is not fit for office believes his behavior in recent court cases has been "extremely dangerous."
Mental health experts are now referring to Donald Trump and his followers as a shared psychosis. But that is only Scientific America.
https://www.scientificamerican.com/article/the-shared-psychosis-of-donald-trump-and-his-loyalists/
The leader, hungry for adulation to compensate for an inner lack of self-worth, projects grandiose omnipotence—while the followers, rendered needy by societal stress or developmental injury, yearn for a parental figure. When such wounded individuals are given positions of power, they arouse similar pathology in the population that creates a “lock and key” relationship.
In my textbook on violence, I emphasize the symbolic nature of violence and how it is a life impulse gone awry. Briefly, if one cannot have love, one resorts to respect. And when respect is unavailable, one resorts to fear. Trump is now living through an intolerable loss of respect: rejection by a nation in his election defeat. Violence helps compensate for feelings of powerlessness, inadequacy and lack of real productivity.