Biography is the medium through which the remaining secrets of the famous dead are taken from them and dumped out in full view of the world. The biographer at work, indeed, is like the professional burglar, breaking into a house, rifling through certain drawers that he has good reason to think contain the jewelry and money, and triumphantly bearing his loot away. The voyeurism and busybodyism that impel writers and readers of biography alike are obscured by an apparatus of scholarship designed to give the enterprise an appearance of banklike blandness and solidity. The biographer is portrayed almost as a kind of benefactor. He is seen as sacrificing years of his life to his task, tirelessly sitting in archives and libraries and patiently conducting interviews with witnesses. There is no length he will not go to, and the more his book reflects his industry the more the reader believes that he is having an elevating literary experience, rather than simply listening to backstairs gossip and reading other people's mails. The transgressive nature of biography is rarely acknowledged, but it is the only explanation for biography's status as a popular genre. The reader's amazing tolerance (which he would extend to no novel written half as badly as most biographies) makes sense only when seen as a kind of collusion between him and the biographer in an excitingly forbidden undertaking: tiptoeing down the corridor together, to stand in front of the bedroom door and try to peep through the keyhole.
Every now and then, a biography comes along that strangely displeases the public. Something causes the reader to back away from the writer and refuse to accompany him down the corridor. What the reader has usually heard in the text - what has alerted him to danger - is the sound of doubt, the sound of a crack opening in the wall of the biographer's self-assurance. As a burglar should not pause to discuss with his accomplice the rights and wrongs of burglary while he is jimmying a lock, so a biographer ought not to introduce doubts about the legitimacy of the biographical enterprise. The biography-loving public does not want to hear that biography is a flawed genre. It prefers to believe that certain biographers are bad guys.
Janet Malcolm: The Silent Woman