Winters, Mary. Lady of letters mystery

"Victorian Countess Amelia Amesbury's secret hobby, writing an advice column for a London penny paper, has gotten her into hot water before; after all, Amelia will do whatever it takes to help a reader in need. But now, handsome Marquis Simon Bainbridge desperately needs her assistance. His beloved younger sister Marielle has written Lady Agony seeking advice on her plans to elope with a man her family does not approve of. Determined to save his sister from a scoundrel and the family from scandal, Simon asks Amelia to dissuade her from the ill-advised gambit. But when the scoundrel makes an untimely exit after a performance of Verdi's Rigoletto, Amelia realizes there's much more at stake than saving a young woman's reputation from ruin. It's going to take more than her letter-writing skills to help the dashing marquis, mend the familial bond, and find the murderer. Luckily, solving problems is her specialty!"--