This biography of one of the most prominent pediatricians of the twentieth century describes his illustrious medical family and his remarkable tenure of nearly three decades as Thomas Morgan Rotch Professor of Pediatrics at Harvard Medical School and head of the department of medicine at Children's Hospital, Boston. During this period Janeway built the first department of pediatrics in the nation with subspecialties based upon the new developments in basic sciences. Janeway and his colleagues defined the gamma globulin disorders that resulted in children's increased susceptibility...