This is a major revision and updating of the classic work in the field of DNA repair by Errol Friedberg published in 1985. The authors have extensively revised the original text and provided more than 4000 references to current primary research literature. In addition, there are four new chapters on mutagenesis. The book will serve as an important reference resource for all courses in DNA repair and mutagenesis, and for molecular biologists working in many areas of cancer research.