His elegantly-crafted tale of sibling rivalry, Honor de Balzac's The Black Sheep is translated from the French with an introduction by Donald Adamson in Penguin Classics. Philippe and Joseph Bridau are two extremely different brothers. The elder, Philippe, is a superficially heroic soldier and adored by their mother Agathe. He is nonetheless a bitter figure, secretly gambling away her savings after a brief but glorious career as Napoleon's...