The "Year Book of Clinical Pathology," along with the numerous siblings in the Year Book family, has established for itself a well-earned place of importance for the busy physician trying to keep up with "the literature." The quality of any such book is determined first by the quality of the articles published in the general field, next by the selection, then by the adequacy of the abstracts, and, finally, by the editor's introduction and commentary on specific articles. The inclusion of original essays introduces variation into a system which tends to become very rigid. The selection of the articles is excellent and gives a good panoramic view of the areas of general pathology. The abstracts, though somewhat uneven, generally are adequate. The personal flavor of the editor is revealed in his introductory essay and lucid and thoughtful commentaries, which are scattered widely and wisely throughout the book as editorial asides.