This book provides an introduction to competition law for students, teachers, and professionals without experience in this area. It covers both EU and UK competition law, including prohibitions on cartels and abuse of dominance, as well as mergers and acquisitions. The second edition has been updated with the latest legal and case developments. Examples from European and UK cases are used to illustrate the principles in an engaging way. The book aims to give readers broad insight into the combined EU and UK competition law system.