'Professor Hartley has drawn on his extensive theoretical and practical knowledge of private international law both in the EU and the US in order to produce this comparative study on international commercial litigation. He demonstrates a superb ability to explain the law and the underlying principles both in the EU and the US. This book is essential reading for anyone interested in understanding the complicated issues of cross-border litigation in the major legal systems. It is also a first-class textbook with a very pedagogical structure and attitude where [the] author challenges the reader by asking questions to case law that is extensively reproduced in the book … an invaluable piece of scholarship for students and scholars alike.' Peter Arnt Nielsen, Copenhagen Business School