– "Is logic empirical?" – "Isagoge" – "Ishmael" – "Iyyun" –  "Jacques Derrida bibliography" – "Jacques the Fatalist" – "James Madison" – "Javid Nama" – "Jerusalem" – "John Dewey bibliography" – "Jordens Herrar" – "Journal for General Philosophy of Science" – "Journal for Peace and Justice Studies" – "Journal of Applied Non-Classical Logics" – "Journal of Applied Philosophy" – "Journal of Automated Reasoning" – "Journal of Business Ethics Education" – "Journal of Business Ethics" – "Journal of Empirical Research on Human Research Ethics" – "Journal of Ethics & Social Philosophy" – "Journal of Indian Philosophy" – "Journal of Information Ethics" – "Journal of Logic and Computation" – "Journal of Logic, Language and Information" – "Journal of Lutheran Ethics" – "Journal of Mathematical Logic" – "Journal of Medical Ethics" – "Journal of Mind and Behavior" – "Journal of Moral Philosophy" – "Journal of Nietzsche Studies" – "Journal of Philosophical Logic" – "Journal of Philosophical Research" – "Journal of Scottish Philosophy" – "Journal of Speculative Philosophy" – "Journal of Symbolic Logic" – "Journal of the History of Ideas" – "Journal of the History of Philosophy" – "Journal of Value Inquiry" – "Journal on African Philosophy" – "Journals of Ayn Rand" – "Journey to the End of the Whale" – "Judge for Yourselves!" – "Julian and Maddalo" – "Julie, or the New Heloise" – "Juliette" – "Jürgen Habermas bibliography" – "Just a Couple of Days" – "Just and Unjust Wars" – "Justine" –  "Kallias-Briefe" – "Kant-Studien" – "Kantian Review" – "Kav ha-Yashar" – "Kennedy Institute of Ethics Journal" – "Kennisbank Filosofie Nederland" – "Key Ideas in Human Thought" – "Khizr-i-Rah" – "Kiss Me, Judas" – "Kit b al-Hayaw n" – "Knowing and the Known" – "Knowledge and Its Limits" – "Knowledge of Angels" – "Kol HaTor" – "Krishnamurti to Himself" – "Krishnamurti's Journal" – "Krishnamurti's Notebook" – "Kritike" – "Kuzari" –  "L'Arco e la Clava" – "L'existentialisme est un humanisme" – "L'expérience intérieure" – "La Géométrie" – "La Part maudite" – "La Peau de chagrin" – "Laches" – "Laelius de Amicitia" – "Language As Symbolic Action" – "Language, Truth, and Logic" – "Languages of Art" – "Lauda Sion" – "Laws" – "Le devin du village" – "Le Monde's 100 Books of the Century" – "Le Ton beau de Marot" – "Lectures and Conversations on Aesthetics, Psychology, and Religious Belief" – "Lectures on Aesthetics" – "Lectures on Jurisprudence" – "Lectures on the History of Philosophy" – "Lectures on the Philosophy of History" – "Lectures on the Philosophy of Religion" – "Left Wing Manifesto" – "Legitimation Crisis" – "Leibniz–Clarke correspondence" – "Leo Tolstoy bibliography" – "Les Temps modernes" – "Les Thanatonautes" – "Letter to a Christian Nation" – "Letter to M. D'Alembert on Spectacles" – "Letters of Ayn Rand" – "Letters to a Philosophical Unbeliever" – "Letters to a Young Contrarian" – "Lettre sur les aveugles à l'usage de ceux qui voient" – "Leviathan" – "Leviathan and the Air-Pump" – "Lex, Rex" – "Liberty Defined" – "Library of Living Philosophers" – "Liezi" – "Life Is Real Only Then, When 'I Am'" – "Life of Castruccio Castracani" – "Life of Jesus" – "Life of Pi" – "Likkutei Sichos" – "Limited Inc" – "Linacre Quarterly" – "Linguistic and Philosophical Investigations" – "Linguistics and Philosophy" – "List of books about philosophy" – "List of books about the Romanian Revolution of 1989" – "List of Federalist Papers" – "List of important publications in philosophy" – "List of logic journals" – "List of philosophy journals" – "List of rasa'il in the Encyclopedia of the Brethren of Purity" – "List of works by Joseph Priestley" – "List of works in critical theory" – "Listen, Anarchist!"