Trust in the European Union in Challenging Times offers an interdisciplinary approach to trust in the European Union (EU) derived from political science, law and economics. It addresses a timely trust-related issue: the authors state that the book is published at a time when the EU is “facing many serious crises” (p. 2). Some of the most significant events in the EU since the fall of the Berlin Wall –Brexit, the refugee and migrant crises, terrorism, debt crises, unemployment, tumultuous elections, the rise of rightists– stress the unity of the EU. Some of these crises are not just political but constitutional. Not only does this edited volume provide an analytic account of trust in the EU, it also considers the consequences for the EU –both at the national and the Union level– when trust is lacking. The book is a great one-stop-shop book for students of EU studies, political science and international relations. It is also useful for policy makers eager to understand the consequences of the current unforeseen problematic situation – the European trust crisis. The main contribution of this book is to show the importance of trust and the consequences of its absence at the EU level as well as its role in tackling the challenges and problems the Union is facing.