A Commentary and Review of Montesquieu's Spirit of Laws: An 1811 commentary by Destutt de Tracy, from the English translation by Thomas Jefferson.
Baron de Montesquieu, Charles-Louis de Secondat: Scholarly study of this key Enlightenment thinker by Hilary Bok. From the Stanford Encyclopedia of Philosophy.
Biography.com: Montesquieu: Concise biographical paragraph.
Catholic Encyclopedia: Montesquieu, Charles-Louis de Secondat, Baron de: Detailed study of this writer's intellectual career, by Antoine Degert.
Censorship File Room: Montesquieu, Works of: Outline of the reception in Rome and Paris of the Persian Letters and The Spirit of the Laws.
Did Montesquieu Use the Bible?: A review the widely-held belief that Montesquieu's doctrine of separation of powers had a scriptural basis.
Free Speech Philosophers: Baron de Montesquieu: Outline of certain points in Montesquieu's teachings about liberty.
Great Voyages: Montesquieu: Biographical timeline.
Liberal Thinkers: Charles de Montesquieu: A short biography from the site of Liberal International.
Wikipedia: Charles de Secondat, Baron de Montesquieu: Entry from this open encyclopedia.