Dr Hanno Wehland is a Legal Counsel at the Permanent Court of Arbitration in the Hague. He has previously practiced in the arbitration groups of Herbert Smith Freehills LLP, London, Eversheds LLP, Paris, and Wilmer Cutler Pickering Hale & Dorr LLP, London, and has extensive experience of both investment and commercial arbitration proceedings. He completed his doctorate in law at the University of Geneva under the supervision of Professor Gabrielle Kaufmann-Kohler and holds degrees from University College London and Humboldt University Berlin. He has published a range of articles in English and German, and also practices in French and Spanish.

There is much in this book to admire. The structure is logical, the research is extensive, the referencing is meticulous, and it is written in a clear, accessible, and lucid style. It pays its due to the work of others on which it builds, and makes an impressive contribution to our understanding of the devices which can be called upon to regulate relations between international courts and tribunals faced with investment disputes. With the continuing rise in the number of investment treaty claims, Dr. Wehlandâs work is likely to be frequently consulted by scholars and practitioners in the field, and deserves to be warmly welcomed into the literature.

• 1. Introduction ; 2. Characteristics of the international investment framework leading to multiple proceedings ; 3. Determining the jurisdictions of competing forums in the context of investment disputes ; 4. Mechanisms for the coordination of multiple investment proceedings ; 5. Hierarchy as a coordinative mechanism in investment treaty arbitration ; 6. The application of lis pendens and res judicata in investment treaty arbitration ; 7. Overarching principles for the coordination of multiple proceedings ; 8. Summary of results and outlook

Dr Hanno Wehland is a Legal Counsel at the Permanent Court of Arbitration in the Hague. He has previously practiced in the arbitration groups of Herbert Smith Freehills LLP, London, Eversheds LLP, Paris, and Wilmer Cutler Pickering Hale & Dorr LLP, London, and has extensive experience of both investment and commercial arbitration proceedings. He completed his doctorate in law at the University of Geneva under the supervision of Professor Gabrielle Kaufmann-Kohler and holds degrees from University College London and Humboldt University Berlin. He has published a range of articles in English and German, and also practices in French and Spanish.

There is much in this book to admire. The structure is logical, the research is extensive, the referencing is meticulous, and it is written in a clear, accessible, and lucid style. It pays its due to the work of others on which it builds, and makes an impressive contribution to our understanding of the devices which can be called upon to regulate relations between international courts and tribunals faced with investment disputes. With the continuing rise in the number of investment treaty claims, Dr. Wehlandâs work is likely to be frequently consulted by scholars and practitioners in the field, and deserves to be warmly welcomed into the literature.

• 1. Introduction ; 2. Characteristics of the international investment framework leading to multiple proceedings ; 3. Determining the jurisdictions of competing forums in the context of investment disputes ; 4. Mechanisms for the coordination of multiple investment proceedings ; 5. Hierarchy as a coordinative mechanism in investment treaty arbitration ; 6. The application of lis pendens and res judicata in investment treaty arbitration ; 7. Overarching principles for the coordination of multiple proceedings ; 8. Summary of results and outlook