Many of the most controversial areas of reform initiated by the Lisbon Treaty were not negotiated in the Treaty itself, but left to be resolved during its implementation. Since the Treaty’s entry into force, the implementation process has already had a profound impact on many areas of EU law and policy, and consolidated new areas of power, such as over foreign investment. This collection gathers leading specialists in the field to analyse the Treaty’s implementationand the directions of legal reform post-Lisbon. Drawing on a range of expertise to assess and comment on the Treaty, the contributors include both academics and practitioners involved in negotiating and implementing the Treaty. Focusing on the central issues and changes resulting from the Lisbon Treaty, the contributors examine the Treaty in the broader background of how the EU, and EU law in particular, has been developing in recent years and provide a contextual understanding of the future direction of EU law in the post-Lisbonera.