The Access to Philosophy series offers a concise and readable introduction to key areas of philosophy for students and the general reader. The Theory of Knowledge explores the nature and extent of knowledge. It looks at the key questions: What do we know? How do we know it? and analyses our right to the beliefs we have, how we acquire them and whether we can take them to be knowledge. Via key philosophy texts, in particular Descartes' Meditations, The Theory of Knowledge covers the following four areas: - Empiricism and Rationalism - Knowledge and Justification - Knowledge and Scepticism - Knowledge of the External World.