Even those who believe in such "roots" might like to hear more about what flowered from them. Wall ascribes to Flaubert a " curiously obsessive passion for objects". He does not compare Flaubert with his contemporaries, and so offers no justification for "obsessive"; had he remembered Walter Benjamin's superb pages on the bourgeois interior under Louis-Philippe, he might have been less brisk in his diagnosis, might even have taken time to dwell on the meticulous poignancy with which Flaubert arranges "pauvres objets" ("wretched things") in his tales. Wall is at his mock-clinical worst when he drones on about Flaubert's " sadism"; cruelty is indeed one of this novelist's subjects and effects, but to confuse cruelty and sadism is a thoughtless vulgarism. Lack of interest in the precise meaning of words is not an advantage for a biographer of Flaubert, though it is a help to the reader of this book - when Wall refers to "an incontinently sadistic Russian mining millionaire", for instance, it's best not to wonder what, if anything, he means exactly. This biography is largely compiled from Flaubert's letters, which is all to the good as they are incomparably zestful, hilarious and sharp, but someone interested in learning more about Flaubert would do better to read his correspondence itself, or a selection of translations from it (there are good ones by Steegmuller and Wall himself), because this book draws on those torrentially opinionated screeds in a prim and desultory way. Given Wall's notion that "one of Flaubert's cherished secrets" is that comedy often springs from the details of our physical processes, it's odd he omits the lyrical evocation of frozen urine in the school toilets at Rouen; as he labours to show that Flaubert was fixated on his mother, why does he not mention the three pages which Flaubert expended in February 1851 on the varieties of breast?