by Stephanie Barron, 1996
(I was confused at first because of “Editor’s Foreword” – Did Jane Austen write it or Stephanie Barron?)
LOVED THIS BOOK!!! Jane goes to the Scargrave Manor for her friend Isobel, newly married to the Earl. He gets murdered by Barbadoe’s nuts, then Marguerite, Isobel’s maid, gets murdered. Everyone has possibilities. You really think it is Lord Harold Trowbridge, but he ends up the good guy. It was Madame Delahoursaye.
Googled Stephanie Barron. She wrote the books using all her research and Jane Austen’s letters to set the stage.