A companion to epistemology. 2nd ed.
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The Routledge companion to ethics
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A companion to metaphysics. 2nd ed.
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A companion to philosophy of religion. 2nd ed.
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Philosophies of the sciences: A guide
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A companion to the philosophy of technology
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A companion to contemporary political philosophy. 2nd ed.
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A companion to ancient philosophy
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The Cambridge companion to early modern philosophy
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The Routledge companion to twentieth century philosophy
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The Continuum companion to continental philosophy
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More companions and guides are listed under categories
General philosophy reference
Branches of philosophy
History of Western philosophy (general)
Classical Graeco-Roman philosophy (general)
Medieval and renaissance philosophy
See Early modern philosophy through 19th century (general); Descartes; Hobbes; Leibniz; Locke; Spinoza; Other 17th-century philosophers
See Early modern philosophy through 19th century (general); Hegel; Kierkegaard; Marx; Mill; Nietzsche; Other 19th-century philosophers
See Derrida; Heidegger; Husserl; Sartre; Wittgenstein; Other 20th-century philosophers
See also 20th-century philosophy (general); Continental philosophy