"Epistemology, or the theory of knowledge, is concerned with how we know what we do, what justifies us in believing what we do, and what standards of evidence we should use in seeking truths about the world and human experience. This comprehensive book introduces the concepts and theories central for understanding knowledge. It aims to reach students who have already done an introductory philosophy course and general readers in epistemology at any level." "Robert Audi's approach is new and exciting, drawing the reader into the rich and fascinating subfields and theories of the subject in a natural way, guided by key concrete examples."--Jacket.