I was very disappointed in this unbalanced view the author presented. It fails to present supporting information that refutes the concept of radiation hormesis. Many of the examples presented as hormesis are actually stress induced changes that may reduce the overall fitness of the organism. For example, the ecologic radon studies of Bernard Cohen which are stated to support hormesis have been shown by Drs. R. William Field and Jay Lubin to be without merit. However, I did find some of the writing heuristic.