Carlson (emer., Stony Brook Univ.) presents the concept of mutation as it has evolved through decades of research. From Darwin's "fluctuating variations" to modern understanding of molecular genetics, the book takes readers through one theory after another to see how various scientists asked key questions in heredity and evolution. The book proves that current understanding of gene mutation did not develop overnight. Rather, the link between mutation and evolution was based on the technologies of the time and improvements in methodologies in mutagenesis and biochemistry, allowing scientists to study the effects of specific mutations. This book provides an excellent view of mutation theories from a historical perspective, and it gives the reader an appreciation for those involved in the process and the difficulty some theories faced in gaining acceptance by the scientific community. Chapters at the end of the book focus on mutation's relationship to society, eugenics, and the overall philosophy of science. It is an easy read for scientists and nonscientists alike, and a valuable resource for genetics or history of science courses. Summing Up: Highly recommended. Academic and general readership, all levels. M. C. Pavao Worcester State College