Books about Philosophy (sorted alphabetically)
- Moderne Probleme (German) Eduard von Hartmann
- monadologie (1909) (French) Freiherr von Gottfried Wilhelm Leibniz
- Mysticism and Logic and Other Essays Bertrand Russell
- Notes de Voltaire et de Condorcet sur les pensées de Pascal (French) Voltaire, Blaise Pascal, comte Nicolas Louis François de Neufchâteau, and marquis de Jean-Antoine-Nicolas de Caritat Condorcet
- On the Significance of Science and Art graf Leo Tolstoy
- Pascal's Pensées Blaise Pascal
- Persönlichkeit (German) Rabindranath Tagore
- Philosophical Letters of Friedrich Schiller Friedrich Schiller
- Philosophical Letters: or, modest Reflections upon some Opinions in Natural Philosophy Duchess of Margaret Cavendish Newcastle
- Philosophical Studies G. E. Moore
- Philosophic Nights in Paris Remy de Gourmont
- Philosophy Bertrand Russell
- Philosophy and the Social Problem Will Durant
- philosophy of life, and philosophy of language, in a course of lectures Friedrich von Schlegel
- Philosophy of Spinoza Benedictus de Spinoza
- Platons Gastmahl (German) Plato
- Positive Outcome of Philosophy Joseph Dietzgen
- Reconstruction in Philosophy John Dewey
- Sämmtliche Werke 8: Vermischte Schriften und Aufsätze (German) Johann Gottlieb Fichte
- Selections from the Principles of Philosophy René Descartes
- Selections from the Writings of Kierkegaard Søren Kierkegaard
- Sous les eaux tumultueuses (French) Dora Melegari
- Supplément au Voyage de Bougainville (French) Denis Diderot
- szellemi erők gyüjtése és pazarlása (Hungarian) Elek Szitnyai
- Tee työtä eläkä joudu epätoivoon! (Finnish) Thomas Carlyle