This important collection, edited by Jenő Czuczai and Frederik Naert, covers the key areas of EU external relations law and broader institutional dimensions and principles of Union law. It does so under five headings - institutional dimensions; principles of Union law and legal theory; international law aspects; specific EU external policies (the Common Foreign and Security Policy; the Common Commercial Policy; and Justice and Home Affairs); and EU international agreements. Well-established academics and experienced practitioners from the different EU institutions offer a unique insight into EU practice and academic analysis of the most pertinent legal issues in the post-Lisbon legal environment of the EU, in particular in the external relations area.