How should we think? What, if anything, keeps us from thinking that way? And how can we improve our thinking and decision making? The primary focus of Jonathan Baron's text is on the second question, but he considers all three in this lively three-part introduction to current research and theory. Part I offers a broad overview of thinking, including its role in problem solving and its relation to learning, intelligence, creativity, and logic. Part II deals with the formation of beliefs and the making of judgments. Part III concerns decisions, morality, intertemporal choice, and the choice of goals. In response to latest developments in decision making, Jonathan Baron has updated and expanded his important book, Thinking and Deciding and has also added a new chapter on fairness.