This newly published second edition is the definitive book covering the essentials of psychiatric-mental health (PMH) nursing applicable at all practice levels and settings. It articulates what is expected of all psychiatric-mental health nurses, specifying the who, what, where, when, why, and how of their practice. The book presents the underlying assumptions and characteristics of PMH nursing, addresses matters of environments and settings as well as education and training requirements, and covers key issues and trends in the field. Additionally, it delves into the ethical and conceptual bases of the specialty, providing a comprehensive understanding for those involved in psychiatric-mental health nursing practice, education, and research. Other nursing and allied healthcare providers, researchers, and scholars will also find value in this content, ensuring that patients receive the most advanced, up-to-date care.