"The book contains a useful discussion on the background and development of the Linear No-Threshold hypothesis (LNTH). After presenting the evidence for the new biology, Dr. Leonard concludes that the human lung cancer risk for radon is not linear with increasing radon concentration exposure." (Antone L. Brooks, PhD International Journal of Radiation Biology Journal, Past Director DOE Low Dose Research Program) "I have reviewed your excellent book "Human Lung Cancer Risks from Radon." It is fantastic, I am recommending to ICRP that we include this in on discussions." (William Morgan, PhD Chair, International Commission on Radiological Protection, Committee on Radiation Effects) "This is a well written and detailed discussion of the current state of the knowledge on the risks of exposure to radon and how the risks are different for different cohorts and levels of exposure." (Michael J. Bonvento, PhD Health Physics Society Journal) "Relative to the book, it is interesting that Leonard shows that the beta rays from the radon progeny deposited in the lungs should produce the low LET charged particle traversals, and activate the AR protection. Hence, as shown by Cohen, increased radon exposure decreases human lung cancer risks." (Theodore Rockwell, PhD Radiation Protection Dosimetry Journal)