This Side of Murder by Anna Lee Huber
In this atmospheric and intricately plotted mystery, war widow Verity Kent attends an engagement party in 1919 that is anything but a celebration. Verity drives to the coast in her late husband Sidney’s roadster, and travels to Umbersea Island, where she finds that most of the guests are connected to Sidney’s army unit. When one of the men is found dead and bad weather strands the guests and a few employees on the island, the tension level cranks up to high. Everyone seems to have a secret, including Verity, who did intelligence work during the war that even Sidney didn’t know about. Many plot twists kept my interest, along with the fast pacing and a very clever mystery. This is the first Verity Kent mystery; the sequel is Treacherous is the Night.