Miss Morton and the Spirits of the Underworld

From the author of the critically acclaimed Kurland St. Mary series, this new historical mystery series is "a charming cross between a Regency romance and a well‑constructed detective story" (Kirkus Reviews), and will appeal to fans of Victoria Thompson and Deanna Raybourn.
Lady Caroline is happy to be back amid the swirl of London society, guiding her employer's daughter, Dorothy Frogerton, through her first Season. Dorothy has been declared "an original" by a patron of the exclusive social club, Almack's, and is sifting through potential suitors. Mrs. Frogerton, meanwhile, finds her own diversions, including spiritualist gatherings at the home of Madam Lavinia, and begs Caroline to come along.
Caroline is skeptical of Madam's antics and faux French accent—until she slips a note into Caroline's hand, which contains intimate family knowledge. Even as Caroline tries to discern whether the spiritualist's powers are real, a much darker mystery...