Designed as a text for advanced philosophy students, this book introduces the reader to the fundamental issues and approaches in the field of epistemology. The author provides a critical survey and assessment of all major competing theories of knowledge - foundations theories, coherence theories, direct realism, reliabilism and probabilism. Pollock clarifies the dinstinguishing features of each theory and analyzes the arguments supporting or refuting them. He makes a strong case for a particular theory - the nondoxastic internalist theory of direct realism - as the most logically defensible.