The book "Free-Radical-Induced DNA Damage and Its Repair" by Clemens Sonntag offers a comprehensive analysis of the chemical processes that lead to DNA damage caused by free radicals. It highlights the mechanisms through which these damages occur and discusses the various sources that can generate free radicals. This work is a valuable resource for professionals and students engaged in radiation biology and DNA repair. It addresses the advancements in research made since the first publication in this field and provides a deeper understanding of the complexity of DNA damage and repair. Collaboration with experts and institutions, such as the Max Planck Institute for Radiation Chemistry, underscores the scientific foundation of the book. The detailed examination of the mechanisms and consideration of recent developments make this book an indispensable reference for anyone dealing with the effects of free radicals on DNA.