An update of Dr. Sternglass' well-known book on the health effects of lowlevel radiation, including a new section on Three Mile Island. The author has argued before that the fallout from bomb tests and the radiation released from nuclear reactors are responsible for large increases in infant mortality and declines in SAT scores. The corollary of his argument is that the military-industrial complex conspires to conceal these facts. Dr. Sternglass expected to and did find the same pattern repeated at Three Mile Island: a significant increase in infant mortality among the population exposed to vented gases, and a coverup. While he is deeply right that the public should be aware that low-level radiation poses risks, his own work has a Cassandra tone; it is not work to convince the skeptic. Dr. Sternglass' chief contribution is to bring the issues to view, and, by anchoring the far end of the spectrum, to lend credibility to other scientists proclaiming the perils.