One entry on her list of five great books about Jane Austen, as shared at the Telegraph:
Let’s start with Jane herself. Her family, alas, destroyed most of her wonderful letters, but some, luckily, survive, mostly to her elder sister, Cassandra. The best collection is edited by Deirdre Le Faye, for Oxford University Press – Jane Austen’s Letters (2011).Read about another book on the list.
Also see: The ten best Jane Austen characters.