The main ways that people can corrupt science—or at least try to—are through hoax and fraud, both of which may be perpetrated by laymen or scientists, and through ideological and political corruption, whose intent in both instances is to mislead the public and both of which may be either deliberate or self-deceiving. In this sequel to John Grant's highly successful Discarded Science—Ideas That Seemed Good at the Time, we are introduced to the world of fraud and deception rather than the gentler realms of mistake and ignorance. As ever Grant is entertaining but the theme is serious and timely. Written by an expert for everyone interested in the history of scientific thinking and the evolution of ideas and theories which affect all of us.