The textbook offers readers a clear and engaging entry point into the central questions of bioethics. It demonstrates how ethical principles such as autonomy, dignity, justice, and human rights can be applied to contemporary medical, technological, and social challenges. Through classical and modern case studies, it provides methodological clarity and argumentative confidence in addressing moral dilemmas — from patient autonomy and global justice to disability and aging ethics. The textbook is aimed at students, teachers, and professionals in philosophy, medicine, ethics, law, and public policy. John-Stewart Gordon is Chief Researcher (full professor equivalent) at the Faculty of Social Sciences, Arts and Humanities, and Adjunct Full Professor at the Department of Applied Informatics, Faculty of Informatics, at Kaunas University of Technology.