This book would not have been possible without the support and encouragement of many people. Many thanks are owed to my two doctoral supervisors: first, to Jürgen Basedow for encouraging me to pursue this project and for giving me all the freedom needed to create this book as it appears today and, second, to Jan Kleinheisterkamp for allowing me to benefit from his expertise and constant support, in particular during my time at the London School of Economics. Furthermore, I am indebted to the German Research Foundation (DFG) for awarding me a generous research grant and for providing me with a unique academic environment at the University of Hamburg’s Graduate School of Law and Economics. I would also like to thank the staff at the library of the Max Planck Institute of Comparative and International Private Law and the Arthur A. Diamond Library at the Columbia Law School for their steadfast support. My research into the crossroads of EU law and international commercial arbitration was advanced again and again by conversations with different scholars, practitioners and some of my dearest friends, among them Eduardo Baistrocchi, George Bermann, Thomas Eger, Karim El Chazli, Peter Kulasza, Daragh McGreal, Francesco Parisi, Maud Piers, Nils Schmidt-Ahrendts, Johannes Schwarze, Christian Steger, Malte Stübinger, Moritz Schmitt, Jan Schmitz, Thomas Ulen, Stefan Voigt, Simon Vorburger and Nils Wighardt. My sincere thanks belong to all of them. My heartfelt gratitude goes to my parents Günther and Liane Engelmann as well as to my brother Jens Engelmann for motivating me and helping me in every conceivable way. Finally, putting in words my gratitude towards Geraldine Blomberg and her support while writing this book is next to impossible. The dedication of this book to her is but a modest attempt.