Narcissists have been much maligned, but according to clinicians who study personality, there are many productive narcissists who succeed spectacularly well in life because they can articulate a vision and make others follow. Elsa Ronningstam, who has been studying and treating narcissists for 20 years, presents a balanced, comprehensive, and up-to-date review of our understanding of narcissistic personality disorder, explaining the range from personality trait, which can be productive, to full-blown disorder, which can be highly destructive. Through fascinating case histories, Ronningstam...