Book excerpt: The main challenges within international human rights law are generally thought to be in the fields of transitional justice, non-state actors, terrorism, development, poverty and environmental degradation. This volume of articles not only covers these mainstream challenges but also a wider and more systematic range, including justiciability of social and economic rights, extraterritoriality, health care and investment arbitration. The key literature selected for this collection includes articles that have appeared in mainstream journals and books from leading publishers as well as papers that have appeared in lesser known journals, hard to find books and UN documents. Some of these are classic essays whilst others are more recent additions that reflect the current state of the debate. The papers are put into context by a specially commissioned introduction by the volume editor. This volume is an invaluable resource for human rights lawyers in search of the key literature in fields outside their own specialization as well as for students, researchers and lecturers seeking an overview of the challenges in human rights law.