The 13th edition of DeLee's Obstetrics, written once again by J. P. Greenhill, is a tour de force. Certainly we have seen the end of the epoch of textbooks, authoritative in a clinical discipline, written by a single author, and covering adequately its theoretical and applied aspects. The obstacles to evolving a textbook which is uniform in style and depth of focus from the efforts of a group of authors have usually turned out to be insuperable; these books tend to confront the student with an unevenness of pace and depth which obstructs his learning. It is no accident that most presently successful texts are either the product of a few authors or the outgrowth of a oneman text such as DeLee's. Greenhill, while adding a considerable number of new collaborators, has achieved a remarkable resolution of the problems of multiple authorship.
The present edition is 150 pages longer than