(Book Jacket Status: Jacketed) Readers of Jane Austen's six great novels are left hungering for more, and more there is: the marvelous unpublished manu*s she left behind, collected here. "Sanditon "might have been Austen's greatest novel had she lived to finish it. Its subject matter astonishes: here is Austen observing the birth pangs of the culture of commerce, as her country-bred heroine, a foolish baronet, a family of hypochondriacs, and a mysterious West Indian heiress collide against the background hum of real-estate development at a seaside resort. "The Watsons," begun in 1804 but never completed, tells the story of a young woman who was raised by a rich aunt and who finds herself shipped back to the comparative poverty and social clumsiness of her own family. The novella "Lady Susan" is a miniature masterpiece, featuring Austen's only villainous protagonist. Lady Susan's subtle, single-minded, and ruthless pursuit of power makes the reader regret that Austen never again wrote a novel with a scheming widow for its heroine. The special joy of this collection lies in Austen's juvenilia-tiny novels, the enchantingly funny "Love and Freindship," comic fragments, and a (very) partial history of England-romping miniatures that she wrote in her teens. Their high spirits, hilarity, and control offer delicious proof that Austen was an artist "born, not made."