Unlike most of the other great philosophers Leibniz never wrote a magnum opus, so his philosophical correspondence is essential for an understanding of his views. This collection of essays by pre-eminent figures in the field of Leibniz scholarship is a most thorough account of Leibniz´s philosophical correspondencee. It both illuminates Leibniz´s philosophical views and pays due attention to the dialectical context in which the relevant passages from the letters occur. The result is a book of enormous value to all serious students of early-modern philosophy and the history of ideas.