This is an ideal book for the general reader and for anyone studying Jane Austen. There are fifteen essays on various aspects of the six novels as well as Austen's letters and the Juvenilia. There is an essay on class as well as one on the professional woman writer which goes into detail about how and when the six novels were published and how much money Austen earned from them in her lifetime.
I was particularly interested in the essays on money - which shows how people with particular incomes could be expected to live and in Jane Austen on screen. This last is covered in much more depth in Paula Byrne's book The Genius of Jane Austen. The Cambridge Companion is particularly useful for its comprehensive section on further reading which is excellent if you want to start reading more widely about Jane Austen.
Jane Austen's novels can be read on so many levels that any book which sheds light on minor aspects of her writing can add more depth to the reading of the books themselves. Even the Juvenilia take on new life when you read about them here as do the letters. Recommended reading if you are at all interested in Jane Austen and her writing.