"An excellent textbook for upper level classes on metaphysics or philosophy of mind ... the book should also have value for professional philosophers because of how it draws out the connections between Lewis's views ... and the critical element of Nolan's exposition should be helpful at points even to experts." - Mind "Daniel Nolan has performed an excellent feat in making accessible one of the deepest thinkers in recent philosophy. He has produced a book that can introduce students and non-specialist philosophers to the range and importance of Lewis's work. This book is a major new aid to understanding Lewis." - Stephen Mumford, University of Nottingham "essential reading for specialists and non-specialists alike in metaphysics, mind, epistemology and language. Nolan has given us a pellucid, lively and accessible overview of the diverse strands of Lewis's work. I know of no other treatment of Lewis that is as useful, comprehensive and well written." - L. A. Paul, University of Arizona "Daniel Nolan has the breadth of knowledge and technical facility to produce this first-rate, user-friendly study of the Lewisian system. In doing so, he has provided a great service to both specialists and non-specialists alike." - Alan Hajek, Australian National University