Méndez-Pinedo has written several books and many articles exploring the general authority and effectiveness of EU and EEA law over national (constitutional) laws and the protection of consumer rights in the European internal market, before and after the financial crisis.[11] Her main focus and perspective is to test whether individual rights given by the European legal system are fully respected and enforced for the by judicial and administrative authorities at national level (law in action vs. law in books).
- The authority of European law. Exploring primacy of EU law and effect of EEA law from European and Icelandic perspectives, together with co-author Ólafur Ísberg Hannesson (Ph.D. European University Institute), 287 pages, Law Institute, University of Iceland, 2012. Research project financed by the Icelandic Research Fund RANNÍS for the period 2010-2012. 2)
- EC and EEA law: A comparative study of the effectiveness of European Law, Europa Law Publishing, Holland, September 2009, 341 p. This book studies why EC law (now EU law) and EEA law provide a more effective judicial protection of individual rights than classic international law. The study focuses on the classic principles of EC/EU law: primacy, direct effect, indirect effect and State liability for breaches of European law as created by the jurisprudence of the European Court of Justice. It aims to determine whether these principles have been incorporated into the EEA legal system in order to provide EEA citizens and economic operators with comparable European rights. The jurisprudence of the EFTA Court is examined in order to cast light on a silent revolution which has taken place in the European landscape: the principle of effectiveness of European law.
- The solution of cross-border consumer claims: the Achilles’ heel of the European Union, edited by the City of Madrid and the Bar Association of Lawyers of Madrid, Spain, January 2002, 187 p. Prologue by the Major of the City and the President of the Bar Association. This book won a research prize organized by these institutions, enjoyed extraordinary attention by the lawyers and made a high impact at the time within the academic field of European law.
- Protection of Consumers in the European Union. Towards a Common Procedural Consumer law, published by the legal publisher Marcial Pons, Madrid, Spain, 1998, 454 p. This is a legal monography based on her doctoral thesis on access to justice for consumers on cross-border claims.
A sample of her research dealing with the primacy and authority of European law is published by the Max Planck Encyclopedia of Comparative Constitutional law (Oxford constitutional law series online).
Her research connected to the Icelandic economic and Icelandic crisis in 2008 and its impact on mortgage creditors is listed at the site of the conference organised by the University of Iceland in 2018.[12]