The second edition of "From Bilateral Arbitral Tribunals and Investment Courts to a Multilateral Investment Court" by Prof. Dr. Marc Bungenberg (Director of the Europa-Institut, Faculty of Law, Saarland University) and Prof. Dr. August Reinisch (Faculty of Law, University of Vienna) is now online available as open access book.
More information and direct access to this book can be found here:
https://link.springer.com/book/10.1007%2F978-3-662-59732-3