Focusing on a moment and a source in nineteenth-century France, Christopher Prendergast takes up a big question that is still with us: What is a classic? The question is, by virtue of its insistent recurrence, itself a classic question. It returns to haunt us. It provided the title of a text for French critic Charles-Augustin Sainte-Beuve in 1850 ("Qu'est-ce qu'un classique?"), as it did in the twentieth century for T.S. Eliot and John Coetzee. Centring...