This volume presents significant recent advances in research and clinical practice in the area of pathological narcissism and narcissistic personality disorder (NPD). Originally published as a Special Supplement to the Journal of Personality Disorders, the book brings together leading clinical experts. Chapters examine the neuroscientific and psychological underpinnings of NPD, describe cutting-edge diagnostic approaches, and explore the complexities of the therapeutic relationship. Addressing the “dos and don'ts” of clinical work with this population, the book reviews the status of specialized treatment strategies—such as transference-focused psychotherapy and mentalization-based treatment—and identifies important directions for future research.