This book is a scholarly and authoritative study in dermatoglyphics. Dr. Cummins is professor of microscopic anatomy, and Dr. Midlo is associate professor in the same department at Tulane University School of Medicine. The first part of the book deals with the history of the study and the details of making and interpreting prints. The last part has to do with the biologic significance of such studies. Of particular interest to pediatricians is the chapter on the diagnosis of twins.