Voltaire "undertook to bring together, in the form of a dictionary, all the ideas, all the views which offered themselves to him on the various objects of his reflections, that is to say on the almost complete universality of human knowledge. In this collection, modestly entitled Questions à des amateurs sur l'Encyclopédie, he speaks in turn about theology and grammar, physics and literature; he discusses sometimes points of antiquity, sometimes questions of politics, legislation, of public law. His style, always lively and spicy, spreads over these various objects a charm of which until now only he has known the secret... " Thus praised by Condorcet, Voltaire's last masterpiece is also his most little-known text. Inaccessible to the general public since 1775, it was until now only familiar to researchers, thanks to the critical edition designed by the Voltaire Foundation under the authority of Nicholas Cronk and Christiane Mervaud, who also edited the present publication. A master in the art of the brief form, the philosopher gives free rein throughout this volume to his literary and intellectual virtuosity in the handling of the most diverse subjects and genres. He deals, among other things, with "Poetic Art" and "Metaphysics", "Justice" and "Honour", "Marriage", "Love" and "Onanism", "Beauty", "Enthusiasm" and "Curiosity", through simple articles, dialogues or tales, often mixed with poetry. Voltaire deploys in these approximately four hundred articles the always invigorating energy of a thought in constant evolution. Today's readers will happily find there a model of sensitivity, critical intelligence and freedom of spirit, against all forms of bad taste and intolerance.