This is a dense but ultimately rewarding introduction to the subject matter. Shaw's prose is at best elliptical; it's very easy to lose the forest for the trees in this book, particular given Shaw's tendency to explain in exhaustive detail the procedural workings of the various international and regional organizations. Although it sometimes reads like a very, very long grocery list, it is an essential reference book for anyone hoping to learn about public international law. Overall, it's a very thorough introduction to the subject matter, and is much more accessible the second and third times through. Complemented by an excellent index and supplementary materials.