A Sense of Destiny by Wendy Soliman

As Flora Latimer settles into life as an independent young woman, she’s dogged by unwanted attentions from Jacob Yardley, the bishop’s nephew, and additional pressure from her father to marry Yardley.
Flora and Archie, the Marquess Felsham, return to Beranger Court, the home of Luke Beranger, the Earl of Swindon, to join his family for the annual autumn fair. Tension between Flora and Luke is tempered by the presence of Violet Baxter, a very pretty fellow guest whom Flora takes an immediate liking to. Violet is engaged to be married but distracted by fears that the death of her father may not have been an accident.
Someone murdered him.
Can Flora and Archie help Violet to find answers? Will the presence of Archie’s old mistress at the fair complicate matters? Why is Yardley in Ashton Keynes too and can anything come of Luke’s attraction towards Violet, a lady who is bound to another by a promise and strong family ties…