Books in Philosophy (sorted alphabetically)
- Philosophy of Despair David Starr Jordan
- Philosophy of the Moral Feelings John Abercrombie
- Pluralistic Universe William James
- Poetics Aristotle
- Poetics of Aristotle Aristotle
- Political Ideals Bertrand Russell
- Politics: A Treatise on Government Aristotle
- Prince Niccolò Machiavelli
- Prince Niccolò Machiavelli
- Principles of Aesthetics De Witt H. Parker
- Problems of Philosophy Bertrand Russell
- Proposed Roads to Freedom Bertrand Russell
- Psychology of Nations G. E. Partridge
- Religion of the Samurai Kaiten Nukariya
- Republic Plato
- Review of the Work of Mr John Stuart Mill Entitled, 'Examination of Sir William Hamilton's Philosophy.' George Grote
- Rudolph Eucken : a philosophy of life Abel J. Jones
- Second Treatise of Government John Locke
- Selections from the Principles of Philosophy René Descartes
- Sextus Empiricus and Greek Scepticism Mary Mills Patrick
- Short History of Greek Philosophy J. Marshall
- Some Turns of Thought in Modern Philosophy: Five Essays George Santayana
- Symbolic Logic Lewis Carroll
- System of Logic, Ratiocinative and Inductive John Stuart Mill
- System of Logic: Ratiocinative and Inductive, 7th Edition, Vol. I John Stuart Mill