Sam Vaknin is the author of Malignant Self Love: Narcissism Revisited and other books about the Narcissistic Personality Disorder and relationships with abusive narcissists and psychopaths.
His books are based on correspondence since 1996 with hundreds of people suffering from the Narcissistic Personality Disorder (narcissists) and with thousands of their family members, friends, therapists, and colleagues.
Sam is not a mental health professional though he is certified in psychological counseling techniques. He served as the editor of Mental Health Disorders categories in the Open Directory Project and on Mentalhelp.net.
Sam was also the editor of the Narcissistic Personality Disorder topic in Suite101, the moderator of the Narcissistic Abuse List and other abusive relationships mailing, support, and discussion groups (with c. 15000 members).