I wonder if "...how people in positions of power can think and behave" includes female people. If I'm not mistaken, I detect a bias here, that says abusive people in power are males. Are there no women in positions of power who are also abusive? If we look at the percentages of men versus women in power, can we also extrapolate or determine in some way percentages, by sex, of power abusers?
Finally, just because you wrote a book on any particular subject, doesn't mean you're an expert on the subject. The substance of the book and the research done to support the author's positions and facts will more likely be determinants of the author's level of expertise. As an example, I could easily write a book on the root causes of dementia...but ah...I'd probably be... What was this post about?