Human beings have been migrant for millennia. Reasons for migration vary from economic, financial, and educational reasons to persecution on religious or other discriminations. Push and pull factors for migration can produce inordinate amount of stress on individuals, families, or groups. Migrant psychiatry is a new discipline bringing together professionals from humanities, arts, sciences, and medicine, including psychiatry and psychology, together to understand the impact of migration on mental illnesses, mental health and well-being of migrant individuals. The Oxford Textbook of Migrant Psychiatry brings together constructs related to theories of migration, the impact of migration on mental health and adjustment, collective trauma, individual identity, and diagnostic fallacies. The book also covers practical aspects of management, including cultural factors, ethnopsychopharmacology, therapeutic interaction, and therapeutic expectation and psychotherapy.