David Lewis 1941-2001 was a celebrated and influential figure in analytic philosophy. When Lewis died, he left behind a large body of unpublished notes, manuscripts, and letters. This volume contains two longer manuscripts which Lewis had originally intended to turn into books, and thirty-one shorter items. The longer manuscripts are 'The Paradoxes of Time Travel', his David Gavin Young Lectures at the University of Adelaide, and 'Confirmation Theory', which is based on a graduate course on probability and logic that he gave at UCLA. Lewis's described his purposes in 'The Paradoxes of Time Travel' as being, 1 to solve a philosophical problem hitherto largely ignored or casually mis-solved by philosophers EL 2 to introduce the layman to various topics in metaphysics, since our problem turns out to connect with many more familiar ones and 3 to show of several of my favorite doctrines and methods in metaphysics'. By contrast, 'Confirmation Theory' is a technical work inbrwhich Lewis aime