This textbook, written by the philosopher Karl Popper, is a classic within science and philosophy. It addresses the core principles of logic and scientific discovery, with the best-known concept being the doctrine of falsificationism. The Logic of Scientific Discovery has had a major influence on both scientists and philosophers after the Second World War. The book offers clear insights into the method of scientific reasoning and remains of inestimable value for anyone who is concerned with the foundations of knowledge and science.