Miss Moriarty, I Presume by Sherry Thomas (2021) Berkley

Another in the series of Lady Sherlock (Charlotte Holmes) who acts as a spokesperson for her 'sick brother'.  In this case, Moriarty hires her to find his daughter, whom he knows exactly where she was hiding, but cannot get any recent sightings.  Everyone in the Cornish community where Ms. Moriarity was living provides a network of lies.  No one wants to help.  Is the community holding her hostage, or is she really hiding?  And what of Moriarity himself, what does he really want?