In three comprehensive volumes divided into five books, Logic of the Future presents a full panorama of Charles S. Peirce's important late writings. Among the most influential American thinkers, Peirce took his existential graphs to be his greatest contribution to human thought. The manuscripts and letters from 1895–1913, most of which are published here for the first time, testify the richness and open-endedness of his theory of logic and its applications. They also invite us to reconsider our ordinary conceptions of reasoning as well as the conventional stories told about the evolution of modern logic. Volume 3/2 of the series contains a comprehensive selection of letters from 1898–1913 exchanged between Peirce and his colleagues and collaborators on the logic and philosophy of existential graphs.