Information and knowledge have become crucial factors in modern labour markets. In this context, labour-management relations are characterised by an increasing and considerable flow of information. These developments are influenced by new management techniques, such as human resources management, in which the individual is identified as a key element in business success. Furthermore, there is the globalisation of the economy, the increase of international corporate mergers and the unfolding of the network society, which goes hand in hand with technological innovations. These developments not only multiplied the needs for information and the flow of data in employment relations, but also improved techniques of data processing revealing sensitive data of employees. This book deals with employment privacy law, a field of knowledge that increasingly gains influence in legal theory and daily practice. It concentrates on the legal regulation of general human resources data as well as sensitve data in the employment context. The book is developed within a comparative perspective, providing an overview and analysis of the Law of each Member State of the European Union in the field of study. It is completed by a comparative summary. Information and insights in this book will be of great value for practicing lawyers, human resources managers, academics, interest groups and policy makers. The specific issue of monitoring and surveillance in the workplace is covered in another highly recommended book.