Prior to COVID-19, as faculty we were already aware of dangerous trends related to suicide and addiction, especially opioids. Current federally endorsed initiatives, such as the Zero Suicide Initiative (2012) and HEAL (Helping to End Addiction Long-term) (2018), underscore the continuing magnitude of these two mental health issues and make clear that nurses practicing in any arena need a strong foundation in psychiatric mental health nursing care. Perhaps as never before, many nurse leaders see this period as an opportunity for nurses to expand their roles and assume key positions in education prevention, assessment, and referral. Nurses are, and will continue to be, in key positions to assist individuals to attain, maintain, or regain optimal emotional wellness. It is hoped that the revisions and additions to this eleventh edition continue to satisfy a need within psychiatric-mental health nursing practice. The mission of this textbook has been, and continues to be, to provide both students and clinicians with up-to- date information about psychiatric-mental health nursing. The user-friendly format and easy-to- understand language, for which we have received many positive comments, have been retained in this edition. We hope that this eleventh edition continues to promote and advance the commitment to psychiatric/mental health nursing.