Though this is obviously intended as a text book, it is far removed in character from the conventional restatement of the subject. The author's approach is fresh and original. While he covers the entire subject in thoroughgoing fashion, he is less concerned with the traditional principles than with the actual theory and practice of international law. This means that there is a distinct shift of emphasis. For, example, he devotes little space to the laws of war, and stresses rather the problem of intervention, the questions of coöperation and the methods of securing redress. The third part of the volume is devoted entirely to the subject of world organization, and contains a detailed discussion of mediation, intervention and the machinery of the League and the World Court. The author has supplied a useful bibliography and list of the more important cases, so that for all practical purposes the book is complete. In view of the tremendous changes that have taken place in the last fifteen years in the entire conduct of international relations a volume of this type has been badly needed.