Through three distinct, distinguished careers as teacher and researcher at Johns Hopkins, researcher at Rockefeller Institute and crusader for improved public health in Colorado, Dr. Florence Sabin's life was her work and the friendships that grew out of it, and because the author has only a superficial grasp of the former -- exclaiming over the mystery and adventure and fascination of medical research, explaining procedures more fully than process -- this has only limited value as a scientific biography. But Dr. Sabin was a pioneer also as a woman in a highly-resistant profession and this aspect -- from the insistence by Baltimore woman's rightsers that women be admitted to Johns Hopkins to Dr. Sabin's own many firsts and culminating honors -- gives her life new documentary as well as old-fashioned inspirational value. (In true Country Bunny tradition, she is the shy, plain drudge become a self-confident leader or, from another view, the unmarried woman made whole). And, with her customary fidelity to the subject, the author does project two of Dr. Sabin's tenets most effectively: that negative results contribute as much as positive, that research, being cumulative, will be superseded. If the book is not a shot of adrenalin neither is it an analgesic.