MENTAL HEALTH IN THEORY AND PRACTICEBy Dr. Mekonnen H. Birru, PhDThis comprehensive textbook provides a complete, clinically oriented exploration of mental health nursing and behavioral medicine, integrating the biological, psychological, and social foundations of mental illness with modern evidence-based treatment strategies. Rooted in the DSM-5-TR diagnostic framework, the text presents each disorder through a structured and educational lens, designed for nursing, medical, and psychology students, as well as practitioners preparing for NCLEX, USMLE, and doctoral board examinations.Scope and StructureThe textbook covers all diagnostic category in psychiatry, including: Neurodevelopmental Disorders (ADHD, Autism Spectrum, Intellectual Disability)Schizophrenia Spectrum and Other Psychotic DisordersMood Disorders (Depressive, Bipolar, and Related Conditions)Anxiety, Obsessive-Compulsive, and Phobic DisordersTrauma and Stressor-Related Disorders (ASD, PTSD, Adjustment Disorders)Somatic Symptom and Dissociative DisordersSexual, Gender, and Paraphilic DisordersSubstance-Related and Addictive DisordersPersonality Disorders (Cluster A, B, C)Neurocognitive and Other Specified/Unspecified DisordersEach chapter presents: Definition and Diagnostic Criteria according to DSM-5-TR.Etiology and Pathophysiology, including neurobiological, genetic, and psychosocial perspectives.Clinical Manifestations and Assessment, including mental status examination, differential diagnosis, and risk assessment.Treatment and Management, featuring pharmacologic and non-pharmacologic interventions.Nursing Process and CJMM Integration, guiding critical thinking from cue recognition to evaluation.Patient and Family Education, crisis stabilization, and community-based care models.Illustrated Clinical Examples and Case Studies connecting theory to practice.Educational DesignThe book contains over 1,200 NCLEX- and board-style questions with detailed rationales, covering knowledge, analysis, application, and synthesis levels. These are designed to build both academic mastery and exam readiness. Every question reinforces understanding of diagnostic reasoning, patient safety, psychopharmacology, and the ethical and legal foundations of psychiatric care.Learning PhilosophyThis work emphasizes that mental health nursing is not merely technical, it is relational. The nurse, physician, or therapist becomes part of the patient's recovery process through presence, communication, and empathy. The author blends scientific precision with compassionate narrative, ensuring that readers not only know how to treat but how to truly care.Drawing on decades of teaching, clinical practice, and academic research, Dr. Birru provides a bridge between psychiatry, neuroscience, psychology, and nursing. The book fosters a multidisciplinary understanding of behavioral medicine, encouraging collaboration across professions for the holistic treatment of mental illness.