What is epistemology or "the theory of knowledge?" What is it really about? Why does it matter? What makes theorizing about knowledge "philosophical?" Why do some philosophers argue that epistemology--perhaps even philosophy itself--is dead? In this succinct, exciting, and original introduction to epistemology, Michael Williams explains and criticizes philosophical theories of the nature, limits, methods, possibility, and value of knowing. A coherent and progressive text, Problems of Knowledge covers both traditional and contemporary approaches to the subject, including foundationalism, the coherence theory, and "naturalistic" theories. As an alternative to these perspectives, Williams defends his own distinctive contextualist approach. Problems of Knowledge provides clear and engaging explanations of the theory of knowledge and why it matters, offering an excellent foundation for students in introductory epistemology courses.