Berkeley's A Treatise Concerning the Principles of Human Knowledge: An Introduction (Cambridge Introductions to Key Philosophical Texts)

Hume's 'A Treatise of Human Nature': An Introduction (Cambridge Introductions to Key Philosophical Texts)

A Treatise Concerning The Principles Of Human Knowledge (Oxford Philosophical Texts)

Rawls's 'A Theory of Justice': An Introduction (Cambridge Introductions to Key Philosophical Texts)

Wittgenstein's: Philosophical Investigations an Introduction (Cambridge Introductions to Key Texts)