With the present volume, the Handbook of the History of Logic makes its first appearance. Members of the research communities in logic, history of logic and philosophy of logic, as well as those in kindred areas such as computer science, artificial intelligence, cognitive psychology, argumentation theory and history of ideas, have long felt the lack of a large and comprehensive history of logic. They have been well-served since the early sixties by William and Martha Kneale's single volume The Development of Logic, published by Oxford University Press. But what such a work cannot hope to do, and does not try to do, is provide the depth and detail, as well as the interpretive coverage, that a multi-volume approach makes possible. This is the driving impetus of the Handbook, currently projected to run to several large volumes, which the publisher will issue when ready, rather than in strict chronological order. Already in production is the volume The Rise of Modern Logic: From Leibniz to Frege. In process are volumes on Mediaeval and Renaissance Logic, The Many-Valued Turn in Logic, and British Logic in the Nineteenth Century. Others will be announced in due course.