Shadow Waltz — Amy Patricia Meade

To the relief of her new fiancé, Marjorie McClelland has hung up her sleuthing sign in favor of dress patterns and cake tiers. But murder has other plans, and when a young mother shows up on Marjorie's doorstep worried about her missing husband, Marjorie takes the case and drags along her favorite millionaire, the quick-witted and irresistible Creighton Ashcroft. Finding the body of a dead woman at an address left behind in the missing husband's pocket has Marjorie suddenly more interested in motives than nosegays.