Most controversial of living philosophers, especially for his devastating criticisms of Plato and Marx and for his uncompromising rejection of inductive reasoning, Sir Karl Popper has relentlessly challenged both the authority and the appeal to authority of the most fashionable philosophies of our time. His own philosophy of critical rationalism has been distinctive in its emphasis on the way in which we learn through the making and correcting of mistakes- on the role played by imagination in proposing new possibilities, and by reason in exposing and eliminating the errors among them. David Miller, once Popper's research assistant and now a leading expositor and critic of his work, has chosen thirty excerpts form Popper's non-technical writings, in the theory of knowledge, the philosophy of science, metaphysics and social philosophy. Together they illustrate the breadth, profundity and originality of Sir Karl's contribution to human learning. In his introduction Miller demonstrates the remarkable unity of Popper's thought, emphasising the simplicity and rigour of his ideas, and their value to many contemporary individual, intellectual and social problems. In good condition, some slight rubbing to the corners.