The work that helped establish Paul Feyerabend's fame and notoriety, Against Method, stemmed from Imre Lakatos's challenge: "In 1970 Imre cornered me at a party. 'Paul,' he said, 'you have such strange ideas. Why don't you write them down? I shall write a reply, we publish the whole thing and I promise you—we shall have a lot of fun.'" Lakatos died before he could write his reply, but For and Against Method reconstructs his original counterarguments from his lectures and presents the Lakatos-Feyerabend correspondence that allows us to share the fun two of this century's great philosophers enjoyed in matching their wits and ideas on science, philosophy, and life.