The author Prof. Dr. Rona Aybay served as a judge on the Human Rights Chamber of Bosnia Herzegovina as one of the eight international judges appointed by the Council of Europe. Among  other international positions of Prof.Aybay  were the memberships of the  "Group of Wise Persons" elected by the Council of Europe to consider the long-term effectiveness of the European Court of Human Rights and the European Commission Against Racism and Intolerance. Prof. Aybay currently teaches at Istanbul Gedik University.Prof. Dr. Mark Villiger who wrote the Foreword for this book served as a judge (2006-2015) and Section President (2012-2015) at the European Court of Human Rights and presently teaches International Law and European Law at Zürich/ Switzerland University.In the  Foreword Prof.Villiger  said :"As its title suggests this book deals with the basics of law though it also contains many elements drawn from legal theory and philosophy."Prof.Villiger's answer to the question "Who will this book be important for?"  is  as follows :This book is of course highly relevant and useful for newcomers to the law. Here they will read and learn about the important principles of law. But it will also be valuable for experienced lawyers who every so often wish to return to  the basics the sources as it were and  to measure  their concepts of the law with these basic considerations. Given the vast field of law it is fascinating  - and indeed reassuring - to see that certain basic principles apply to all fields of law. In addition I believe that this book  will provide stimulating  reading for laypersons who wish to see what law is all about?"Publishing  of this  updated and revised new edition of Prof. Aybay's book is a source of pride for DER Publishers.