This volume investigates the structural and normative tensions currently threatening the established legal order of the European Union. The author, Amanda L. Tyler, utilizes a combination of treaty analysis and judicial review to examine how specific political and economic activities challenge the foundational principles of the EU. The work argues that these challenges, whether rooted in precise legal mandates or ambiguous norms, necessitate a re-evaluation of the Union's relationship with international law and its own internal sovereignty.

Legal scholars and practitioners frequently cite this work for its rigorous examination of the intersection between EU treaties and contemporary geopolitical crises. Experts highlight the text as a sophisticated resource for understanding the evolving nature of European legal authority in a post-Brexit landscape.