What is knowledge? Why is it valuable? How much of it do we have (if any at all), and what ways of thinking are good ways to use to get more of it? These are just a few questions that are asked in epistemology, roughly, the philosophical theory of knowledge. This is Epistemology is a comprehensive introduction to the philosophical study of the nature, origin, and scope of human knowledge. Exploring both classic debates and contemporary issues in epistemology, this rigorous yet accessible textbook provides readers with the foundation necessary to start doing epistemology. Organized around 11 key subtopics, and assuming no prior knowledge of the subject, this volume exposes readers to diverse, often contentious perspectives--guiding readers through crucial debates including Hume's problem of induction, Descartes' engagement with radical skepticism, rationalist and empiricist evaluations of a priori justification, and many more. The authors avoid complex technical terms and jargon in favor of an easy-to-follow, informal writing style with engaging chapters designed to stimulate student interest and encourage class discussion. Throughout the text, a wealth of up-to-date references and links to online resources are provided to enable further investigation of an array of epistemological topics. A balanced and authoritative addition to the acclaimed This is Philosophy series, This is Epistemology is a perfect primary textbook for philosophy undergraduates, and a valuable resource for general readers with interest in this important branch of philosophy.