This new edition sets out an account of EU law that includes not only that law's established features, but captures its development in recent years and the challenges facing the European Union. With dedicated new chapters on climate change, data protection, free movement of capital, and the EU's relations with other European States, topics such as the Union's response to covid-19 and the Ukraine crisis are addressed in detail. As with previous editions, the new edition integrates case law, legislation, academic materials and wider policy contributions in a way that broadens students' understanding of the law and prompts greater critical reflection on the limits, challenges, and possibilities of EU law. It seeks to set out EU law not so much as a series of laws to be learned but as something that stimulates heavy debate about some of the most contentious and significant issues of our time.