Preface to the second edition; 1. Knowledge, truth, and justification; 2. The traditional analysis and the Gettier problem; 3. Foundationalism; 4. The coherence theory of justification; 5. Reliabilism and virtue epistemology; 6. Internalism and externalism about justification; 7. Epistemic circularity; 8. Skepticism; 9. The problem of the criterion; 10. The a priori; 11. Naturalized epistemology; 12. Testimony and disagreement.