Book excerpt: Volume IV of The Handbook of Systemic Family Therapy considers family-level interventions for issues of global public health. Information on the effectiveness of relational treatment is included along with consideration of the most appropriate modality for treatment. Developed in partnership with the American Association for Marriage and Family Therapy (AAMFT), it will appeal to clinicians, such as couple, marital, and family therapists, counselors, psychologists, social workers, and psychiatrists. It will also benefit researchers, educators, and graduate students involved in CMFT.