Aristotle's theory of truth has been the most influential account of the concept of truth from Antiquity onwards. In this book, the first dedicated to this topic, Paolo Crivelli discusses all the main aspects of Aristotle's views on truth and falsehood. He analyses in detail the main relevant passages, addresses some well-known problems of Aristotelian semantics, and assesses Aristotle's theory from the point of view of modern analytic philosophy.