“Climate Uncertainty and Risk” provides a balanced, fair assessment of the content and conclusions of the IPCC ARs. It compares and contrasts some ancient but mostly more recent climate conditions and events in making the case for a broader inclusion of past situations to better understand and simulate the climate future. The book includes a thoughtful look at climate change versus COVID-19 risk, especially relative to applying the “precautionary principle.” “Climate Uncertainty and Risk” is an essential contribution to understanding and mitigating climate change. Ms. Curry’s goal is to better inform the reader “as to the uncertainties and the various values in play” surrounding the judgments as to “whether warming is dangerous or whether urgent action to reduce CO2 emissions is needed.”—Anthony J. Sadar, The Washington Times