Not all "networks" deserve this name, in Public Health and beyond. Interorganisational networks are a particular organisational form, a means for institutions to jointly achieve complex goals in fast changing environments. The field of Health Promotion did spearhead a network approach: to implement the settings approach on a large scale without compromising participation. Yet, the systematic assessment of the networks received little research attention. This book responds: It presents current research knowledge, explains network and health promotion approach alike; offers a practical network assessment tool; and pays particular attention to European and national networks for Health Promoting Schools and similar settings.