Lord Slynn of Hadley is one of the outstanding judges of his time. He has served as a High Court Judge, as an Advocate General and Owa Judge of the European Court of Justice, and he has been a Lord of Appeal for ten years. This Liber Amicorum bears testimony to the international reputation that he has achieved for his judgments and for his scholarship. In the many distinguished contributions, judges from international courts and from Supreme Courts and Constitutional Courts, together with academics from leading universities around the world, have taken the opportunity to celebrate the accomplishments of Lord Slynn's legal career thus far, and also to discuss areas of law where Lord Slynn can be expected to give important impulses to further development. The thirty years of the legal life of Lord Slynn of Hadley (Gordon Slynn as he is known to his friends) have seen remarkable developments and changes in the legal scenery, both domestic (British), and international. This book, by his friends, extends widely. Recollect that there is a separate volume covering the European Court of Justice, and yet there is enough in this publication to celebrate several separate careers. The reader will note that there are contributions from justices of eight Supreme Courts, plus the German Constitutional Court, the Conseil Constitutionel and the European Court of Human Rights, from ten universities, many of them multiple, together with famous institutions and individuals in many different fields. Even Lord Slynn's young lecturer interest in Air Law is reflected by a professional paper on the Law of Space. Many, if not most, of the contributions bear, appropriately, on the question of the role of courts in reviewing actions of the legislature and the executive, but there are also articles to attract other diverse specialists, several, no doubt to Lord Slynn's pleasure, provocative and forward-looking. Lord Slynn is happily still in office, so this is really a "Festschrift" of celebration.