Titles

 "Fundamental Principles of the Metaphysics of Morals," Literary and Philosophical Essays, French, German and Italian, the Harvard Classics (Immanuel Kant)

 A Discourse on Political Economy (Jean-Jacques Rousseau)

 A Discourse on the Moral Effects of the Arts and Sciences (Jean-Jacques Rousseau)

 A Discourse on the Origins of Inequality (Jean-Jacques Rousseau)

 A Letter Concerning Toleration (John Locke)

 An Enquiry Concerning Human Understanding (David Hume)

 An Enquiry Concerning the Principles of Morals (David Hume)

 An Essay Concerning Human Understanding (John Locke)

 An Inquiry Into the Nature and Causes of the Wealth of Nations (Adam Smith)

 Candide: or, the Optimist (Voltaire)

 Concerning Civil Government, Second Essay: An Essay Concerning the True Original Extent and (John Locke)

 Dialogues Concerning Natural Religion (David Hume)

 Discourse on the Method: Of Rightly Conducting the Reason, and Seeking Truth in the Sciences (René Descartes)

 Ethics Part 1 (Benedict de Spinoza)

 Ethics Part 2 (Benedictus de Spinoza)

 Ethics Part 3 (Benedictus de Spinoza)

 Ethics Part 4 (Benedictus de Spinoza)

 Ethics Part 5 (Benedictus de Spinoza)

 Improvement of the Understanding (Benedictus de Spinoza)

 Letters on England (Voltaire)

 Leviathan (Thomas Hobbes)

 Meditations on the First Philosophy: In Which the Existence of God, and the Real Distinction (René Descartes)

 New Atlantis (Francis Bacon)

 The Age of Reason (Thomas Paine)

 The Confessions of Jean-Jacques Rousseau (Jean-Jacques Rousseau)

 The Critique of Aesthetic Judgement: Part One of the Critique of Judgement (Immanuel Kant)

 The Critique of Pure Reason (Immanuel Kant)

 The Essays (Francis Bacon)

 The Metaphysical Elements of Ethics (Immanuel Kant)

 The Novum Organum (Francis Bacon)

 The Science of Right (Immanuel Kant)

 The Social Contract (Jean-Jacques Rousseau)

 Theologico-Political Treatise — Part 1 (Benedictus de Spinoza)

 Theologico-Political Treatise — Part 2 (Benedictus de Spinoza)

 Theologico-Political Treatise — Part 3 (Benedictus de Spinoza)

 Treatise of Human Nature: Being an Attempt to Introduce the Experimental Method of Reasoning in Moral Subjects (David Hume)

 Valerius Terminus; of the Interpretation of Nature (Francis Bacon)