ENOLA HOLMES AND THE BLACK BAROUCHE

Novel. When a young professional woman, Miss Letitia Glover, shows up on Sherlock's doorstep, desperate to learn more about the fate of her twin sister, it is Enola who steps up. It seems her sister married the Earl of Dunhench and, per a curt note from the earl, has died. But Letitia is convinced this isn't the truth.