I did not care for the book. Based on my own clinical experience, I think that most (probably all) of us have some degree of any number of "disorders", just as the many disorders have great ranges of severity. The labeling of those described in the book made me uncomfortable. While I don't doubt that they had the disorders, I don't buy that the disorders made them leaders, or that the disorders necessarily affected their leadership and decisions. Possible? yes, of course. Definitely? no.
(Just as a side note: my husband found the cover of the book to be quite "creepy"!)