A study of the development of Deweys logic from 19161937 leading up to his final 1938 book on the subject.By 1916 Dewey had written two volumes on logical theory. Yet in light of what he would write in his 1938 Logic The Theory of Inquiry much remained to be done. Dewey did not yet have an adequate account of experience suitable to explain how our immediate experiencing becomes the material for logical sequences series and causal relations. Nor did he have a refined account of judging propositions and conceptions. Above all his theory of continuitycentral to all of his logical endeavorswas rudimentary. The years 19161937 saw Dewey remedy these deficiencies. We see in his published and unpublished articles books lecture notes and correspondence the pursuit of a line of thinking that would lead to his magnum opus. John Deweys Later Logical Theory follows Dewey through his path from Essays in Experimental Logic to the publication of Logic The Theory of Inquiry and complements James Scott Johnstons earlier volume John Deweys Earlier Logical Theory.