Jon Elster's Reason and Rationality is characteristically erudite, elegant, and philosophically sophisticated. It beautifully encapsulates lines of research that Elster has been developing for years, and it serves as a wonderful introduction to his more technical work.—Daniel Weinstock, University of Montreal"This short book presents a broad synthesis of Jon Elster's work on reason and rationality, and their complex relations to interest and passion. With clarity and elegance, it presents some of the main positions of one of the most important authors on the subject. Reason and Rationality is a pleasure to read."—Dominique Leydet, Université du Québec à Montréal