This book addresses various issues arising in the context of the recently introduced Reg. (EU) 2016/679 on the General Data Protection of natural persons with regard to the processing and free movement of personal data (GDPR). Its main purpose is to inform and prepare -to the best possible extent- legal professionals as well as anyone subject to the Regulation’s scope, ensuring the successful transition from the Directive 95/46/EC (transposed into national law by Greek Law No. 2472/1997) to the new regulatory framework established by the GDPR, entering into force in 25.5.2018. The book contains an in-depth analysis about numerous issues, such as: the newly reformed rights, access to authentic instruments and public documents, minors’ consent to process their personal data, freedom of expression and research, biometric and genetic data, employment relationships, DPO’s obligations and responsibilities, the principle of transparency relating to the processing of personal data, transfer of personal data to third countries or international organizations, cooperation and consistency mechanism (one stop shop).