The Promise Rose — Joan Vincent

When Lady Barry danced with a masked gentleman at Raneleagh Gardens, she felt a surprising tingle of pleasure. This was no stranger, but the now Earl of Prideau, who had broken his pledge of love. Lady Barry was struggling to free her late husband's estate from his debts, and now attempts were made on her stepson's life. Was Prideau the villain, or would he solve the mystery? Georgian Romance by Joan Vincent; originally published by Avalon