Ariadna Ripoll Servent is Junior Professor of Political Science at the University of Bamberg. Her research interests include European institutions, decision-making, institutional and policy change as well as internal security policies. She has previously worked at the Institute for European Integration Research in Vienna, the University of Sussex and the College of Europe.

• Introduction PART I 1. The European Parliament: From 'talking-shop' to Co-decider 2. Patterns of Behaviour: Consultation, Co-decision, and Consent 3. Why do Positions Shift? Models of Change Under Co-decision PART II 4. Deciding on Liberty and Security in the European Union 5. The Data Retention Directive: Success at any Price 6. The Returns Directive: Normalising Change 7. The SWIFT Agreement: Retaliation or Capitulation? 8. The Receptions Directive: Internalising Change 9. Conclusions: Conditions and Drivers for Policy Change

"This book addresses a very topical puzzle that cuts across both institutional issues and policy debates. ... The book is cohesive and reads well. ... Overall the book is a very valuable contribution both for academics and practitioners alike and substantially contributes to our understanding both of the role of the EP, of EU decision-making procedures and of the domain of AFSJ." (Christine Neuhold, Journal of Common Market Studies, Vol. 54 (3), 2016)