...includes hard-hitting and well-reasoned chapters on international organizations as a forum for treaty-making, their constitutive treaties, and their treaty-making powers...a necessary title for any library (or personal) collection which focuses or touches upon the increasingly overlapping State and organizational treaty regimes. American Society of International Law Newsletter Issue 38, May 08 Catherine Brolmann's book is a welcome addition to literature addressing the role of intergovernmental organisations...as autonomous actors within international law. Given the importance of autonomous organisations in the delivery of effective collective security and peacekeeping, this book can be seen as a valuable addition to the literature analysing and perhaps developing the conceptual framework surrounding conflict and security law...Brolmann has written a fine study, and her analytical history of accommodating IGOs within the law of treaties is sufficient contribution in and of itself. It also represents a welcome move to thinking about institutional capacities beyond the functionality which characterises much institutional law. In fact, by engaging with this area of law on its own (positivist) terms, the book is not only more accessible, but it is also a more devastating critique for this reason...a fine, inspiring book with broad and lasting significance. Richard Collins Journal of Conflict & Security Law Vol. 13 No 1, 2008 ...offers a much deeper insight and analysis of the essential issue of the legal personality of international organizations than what may be found in most handbooks in the field. It also provides welcome clarifications on some classical concepts, such as that of 'competences' of international organizations, which are not always dealt with in a satisfactory fashion in other writings... Pierre Klein Netherlands International Law Review Issue 3, 2008 With this book the author has produced a work which enriches the body of literature on international organizations with an original and creative treatment of much discussed topics. Kirsten Schmalenbach European Journal of International Law Vol 20, No 2, April 2009 Brolmann writes clearly and draws from a wide range of material on international organizations; the book is well-documented and is usable as a treatise on international organizations... Steve Charnovitz The American Journal of International Law Vol 103, No 3, July 2009