This volume brings together the scientific contributions to the 3rd Trinational Symposium on Biological Psychiatry. It reflects the current state of research in this field within the German-speaking world. Notably, the event has a strong interdisciplinary character, uniting psychiatrists, clinical pharmacologists, psychologists, statisticians, geneticists, immunologists, and representatives from neuroscience, addressing topics in adult, child, and geriatric psychiatry. The book is organized according to the main themes: biochemistry of schizophrenia, chronobiology and sleep, imaging techniques and electrophysiology, course parameters, opioid dependence, child, adolescent, and geriatric psychiatry, clinical psychopharmacology, neurological soft signs, treatment and prevention of affective psychoses, genetics and immunology of mental disorders, and psychoneuroendocrinology. The 200 contributions illustrate the rise of biological psychiatry and serve as a testament to the intensive research in this field.