- Proposed Roads to FreedomAuthor: Bertrand RussellLanguage: English
- Review of the Work of Mr John Stuart Mill Entitled, 'Examination of Sir William Hamilton's Philosophy.'Author: George GroteLanguage: English
- Rudolph Eucken : a philosophy of lifeAuthor: Abel J. (Abel John) JonesLanguage: English
- Second Treatise of GovernmentAuthor: John LockeLanguage: English
- Selections from the Principles of PhilosophyAuthor: René Descartes, John VeitchLanguage: English
- Sextus Empiricus and Greek ScepticismAuthor: Mary Mills PatrickLanguage: English
- Some Turns of Thought in Modern Philosophy: Five EssaysAuthor: George SantayanaLanguage: English
- The Analysis of MindAuthor: Bertrand RussellLanguage: English
- The AntichristAuthor: Friedrich Wilhelm Nietzsche, H. L. (Henry Louis) MenckenLanguage: English
- The Approach to PhilosophyAuthor: Ralph Barton PerryLanguage: English
- The Case of Wagner, Nietzsche Contra Wagner, and Selected Aphorisms.Author: Friedrich Wilhelm NietzscheLanguage: English
- The CategoriesAuthor: Aristotle, E. M. (Ella Mary) EdghillLanguage: English
- The Communist ManifestoAuthor: Karl Marx, Friedrich EngelsLanguage: English
- The Critique of Pure ReasonAuthor: Immanuel Kant, J. M. D. (John Miller Dow) MeiklejohnLanguage: English
- The Game of LogicAuthor: Lewis CarrollLanguage: English
- The Nicomachean ethics of AristotleAuthor: AristotleLanguage: English
- The Philosophy of DespairAuthor: David Starr JordanLanguage: English
- The Philosophy of the Moral FeelingsAuthor: John AbercrombieLanguage: English
- The Poetics of AristotleAuthor: Aristotle, S. H. (Samuel Henry) ButcherLanguage: English
- The PrinceAuthor: Niccolò Machiavelli, Marriott, W. K. (William Kenaz), -Language: English
- The Principles of AestheticsAuthor: De Witt H. (De Witt Henry) ParkerLanguage: English
- The Problems of PhilosophyAuthor: Bertrand RussellLanguage: English
- The Psychology of Nations: A Contribution to the Philosophy of HistoryAuthor: G. E. (George Everett) PartridgeLanguage: English
- The Religion of the Samurai: A Study of Zen Philosophy and Discipline in China and JapanAuthor: Nukariya, KaitenLanguage: English
- The RepublicAuthor: Plato, Benjamin JowettLanguage: English
- The Theological Tractates and The Consolation of PhilosophyAuthor: Boethius, Edward Kennard Rand, H. F. (Hugh Fraser) StewartLanguage: English
- TheaetetusAuthor: Plato, Benjamin JowettLanguage: English
- Theologico-Political Treatise — Part 1Author: Benedictus de Spinoza, R. H. M. (Robert Harvey Monro) ElwesLanguage: English
- Theologico-Political Treatise — Part 2Author: Benedictus de Spinoza, R. H. M. (Robert Harvey Monro) ElwesLanguage: English
- Three Dialogues Between Hylas and Philonous in Opposition to Sceptics and AtheistsAuthor: George BerkeleyLanguage: English
- Thus Spake Zarathustra: A Book for All and NoneAuthor: Friedrich Wilhelm Nietzsche, Thomas CommonLanguage: English
- Tractatus Logico-PhilosophicusAuthor: Ludwig Wittgenstein, Bertrand Russell, C. K. (Charles Kay) OgdenLanguage: German
- UtilitarianismAuthor: John Stuart MillLanguage: English