Lorena Bachmaier Winter is Full Professor at the Complutense University in Madrid, Department of procedure and criminal law since 1996. She has written extensively in the area of litigation, fair trial rights, justice systems and procedure published in more than seven languages. She is regular speaker in international conferences. She is a member of the most relevant international academic associations, as AIDP, the IACL or the European Law Institute, and member of the editorial board of numerous law reviews. She has been visiting professor or researcher in foreign institutes and universities as, for example, the Max-Planck-Institute for Foreign and International Criminal Law, Freiburg Institute for Advanced Studies (FRIAS) or the Universities of Berkeley, Harvard and Stanford (USA). Her present research is focused on comparative criminal procedure, rule of law and judicial independence, human rights and procedure, and the EU process of legal harmonization. Her last book published with Springer within this collection was "The European Public Prosecutor. The challenges ahead", 2018.She also works regularly as an international legal expert for the Council of Europe and other international organizations in legal reforms in Eastern European countries and also in Central and was chair of the committee on Transnational Organized Crime of the Council of Europe in 2013-2014. Since 2022 she is member of the Expert Group on Criminal Policy of the European Union Commission.Stefano Ruggeri is doctor juris at Sant’Anna School of Advanced Studies of Pisa. Currently, he is Full Professor at the Law Department of Messina University, holding the chair of Italian, European and Transnational Criminal Justice. He is member of the editorial and advisory boards of various national and international journals (La Legislazione penale, Revista brasileira de direito processual penal, Revista de la Asociación de Profesores deDerecho Procesal de las Universidades Españolas), as well as the editorial board of the Book Series Procedura penale (Giappichelli) and Editor in Chief of the Book Series Legal Studies in International, Comparative and European Criminal Law (Springer International Publishing). He is was awarded a Humboldt-Fellowship for experienced researchers, carrying out his researches at the Max-Planck Institute of Foreign and International Criminal Law (Freiburg i.Br.). His main research areas encompass, inter alia, general theory of law, evidence law, transnational criminal justice, comparative criminal law, and European criminal justice.