Early intervention (EI) is the single most important advance in mental health care in recent decades, representing a key shift in both theoretical standpoint and service delivery. Early Intervention in Psychiatry clearly describes best practice for extending this approach to all psychiatric disorders. Beginning with the rationale for EI, it informs interventions in people from all age groups across the lifespan, from perinatal to old age. It addresses EI in specific settings, such as primary...