A Devious Death

While on a visit to a country estate, a lady and her maid “devise a clever plan to catch the killer” in this mystery set in post-WWI England (Kirkus).
 
Lady Phoebe Renshaw and her sister Julia are eager for a summer getaway at High Head Lodge, their cousin Regina’s newly purchased estate. But they are not the only houseguests. Regina's mother and brother—bitter over the unequal distribution of her father's inheritance—have descended on the house to confront her.
 
In addition to the family tension, Eva is increasingly suspicious of Julia's new maid, wondering why she left her former employer so suddenly—and why she seems to make Regina so ill at ease. But things go from tense to tragic when their hostess is mysteriously murdered in her bed with no sign of struggle. Now, with suspects in every room, Phoebe and Eva must catch a killer before their brief getaway leaves them gone for good.