Why is there something rather than nothing? Does God exist? Does time flow? What are we? Do we have free will? What is truth? Metaphysics is concerned with ourselves and reality, and the most fundamental questions regarding existence. This clear and accessible introduction covers the central topics in metaphysics in a concise but comprehensive way. Brian Garrett discusses the crucial concepts in a highly readable manner, easing the reader in with a look at some important philosophical problems. He addresses key areas of metaphysics: God Existence Modality Universals and particulars Facts Paradoxes of material constitution Causation Time Free will Personal identity Truth. This second edition has been thoroughly revised. Most chapters include substantial amounts of new material, and there are additional chapters on Existence, Modality, Facts and Paradoxes of Material Constitution. What is this thing called Metaphysics? contains many helpful student-friendly features. Each chapter concludes with a useful summary of the main ideas discussed, a glossary of important terms, study questions, annotated further reading, and a guide to web resources. Text boxes provide bite- sized summaries of key concepts and major philosophers, and clear and interesting examples are used throughout.