The Ozone Layer is an accessible history of stratospheric ozone, from its discovery in the nineteenth century to current investigations of the Antarctic ozone hole. Drawing directly on the scientific literature, Christie uses the story of ozone as a case study for examining fundamental issues relating to the practice of modern science and the conduct of scientific debate. Linking key debates in the philosophy of science to an example of real-world science it is an excellent and thought-provoking introduction to the philosophy of science.