Long awaited, the final book in the trilogy reporting the remarkable longitudinal study of 1,000 families and their children in Newcastle Upon Tyne, England has now appeared.1 No summary can do justice to the data, the quality of the writing, or the insights into the health needs of children which reading this book will provide. "The chief determinants of performancebiologic growth, injury and disease, social adaptation, and educational attainmentsare so interrelated that separation, even for classification and description, brings a sense of artificiality." This statement from the book emphasizes the dangers of compartmentalization and specialization in child health work. Reading the book will be a good antidote to some of the necessary compartmentalization that we all must do in our practice or research. Happy reading!