After the spate of newspaper and magazine articles on the topic of heart transplants, Dr. Moore's book, written by a researcher in the field, provides some professional judgments. Moore gives an insider's view of developments in transplantation, beginning with kidney transplants in the early '50's and ending up with an analysis of future prospects. He explains the evolution of technique from the early methods applicable only to identical twins up to current chemical suppression of rejections. Moore critically examines the record of heart transplantation and finds that the need now is for more research and fewer operations on humans to increase the abysmally low survival chances. He also discusses the ethical questions involved in obtaining donors and determining times of death. When does a person become a cadaver, so that still functioning organs can be removed? Moore avoids the overstatements of most journalists, but he has his own biases toward his fellow transplanters and tends to excuse their excessive enthusiasm for untried methods. And his book certainly doesn't have the personal inflection of Thomas Thompson's Hearts (p. 864).