Winters, Mary. Lady of letters mystery

"Countess by day, secret advice columnist by night, Amelia Amesbury has life happily balanced on a quill's edge...until her sister Margaret shows up in London under a blanket of scandal and Amelia is catapulted out of mourning and into the ton's unforgiving Season. However Madge's Season debut is marred by a rather inconvenient death at the dining table as the infamous Mr Radcliffe takes ill and is later confirmed dead by poisoning. With Madge being the last person to have cross words with the soon-to-be baron, the ton's gossip mill - and the police - are looking to pin the murder on her. Adding to the ton's troubles is a jewellery thief targeting the most lavish of Society's houses. Is the murderer and the thief one in the same? It falls to Amelia once again to uncover the secrets buried deep within the pages before her sister goes down for the crimes."--Dust jacket flap