Contains nineteen newly commissioned articles by top philosophers on various aspects of the theory of knowledge. The articles survey the field as well as make original contributions to contemporary debates. This is an extensive collection of well-chosen papers on a wide range of topics in current mainstream epistemology, all of which are written by international experts and published here for the first time. Most papers do not require any specialist knowledge in epistemology, although there are exceptions to this general rule. As my own teaching confirms, this book is ideal as an introductory text for a wide range of graduate students in epistemology, philosophy of science, and the epistemology of ethics.