Since the EC Merger Regulation was adopted in 1989, merger control has become established as an important part of EC competition law so that today all major businesses and law firms are aware of the Commission s extensive powers in this field. Right from the beginning the Regulation s scope has occupied a central role in many mergers taking place both inside and outside the European Community. The second edition of The European Commission s Jurisdiction to Scrutinise Mergers provides the most thorough examination of the Commission s jurisdiction to examine mergers under the Regulation. Even though the Merger Regulation provides a detailed account of what mergers fall within the Commission s jurisdiction and irrespective of the large number of cases that has now been decided by the Commission, the delimitation of jurisdiction continues to create significant problems. The second edition of The European Commission s Jurisdiction to Scrutinise Mergers offers a comprehensive and up-to-date analysis of all aspects of this delimitation. Moreover, several present and future Member States have introduced national merger control schemes where the jurisdictional delimitation has been copied from the Merger Regulation. The second edition of The European Commission s Jurisdiction to Scrutinise Mergers, second edition is therefore also a useful tool for the interpretation of these national schemes. In sum, The second edition of The European Commission s Jurisdiction to Scrutinise Mergers provides valuable guidance to businesses, their legal advisors and competition law enforcers in the Commission as well as in the Member States.