'Health Care Compliance in Data Protection. A Challenge Between Big Data and the General Data Protection Regulation (GDPR) - A Comparative Study of European and German Data Protection Law': This book explores how the right to informational self-determination can be protected in the face of Big Data and digital health tools. Focusing on GDPR, German law, and the healthcare sector, it combines legal, ethical, and societal perspectives to show how data protection can support, not hinder, innovation.