Murder at the Brightwell by Ashley Weaver

Amory Ames spends her days alone in her country house while her husband, Milo, travels to Monte Carlo and the Riviera without her. She wonders if she made the wrong decision in marrying Milo, who is known as a playboy. When her old friend (and ex-fiancee) Gil Trent asks for Amory's help in convincing his sister Emmeline to break off her relationship with Rupert Howe (a man very much like Milo), she agrees and they travel to the seaside Brightwell Hotel. Soon, however, Rupert is murdered, probably pushed over a cliff. Several people knew of Gil's intense dislike for Rupert, which makes him the prime suspect. Amory knows he's innocent and decides she must do all she can to clear his name. When Milo arrives, the tension between Amory, Gil, and Milo intensifies. Will Amory be able to help Gil, despite being an emotional muddle? Murder at the Brightwell is a historical mystery (set in 1932) that will appeal to readers who enjoy Tasha Alexander, Deanna Raybourn, and the Royal Spyness series by Rhys Bowen.