Wildwinds — Leslie O'Grady

When Lalla Hunter is lured back to Wildwinds, the dark house of secrets overlooking the Hudson River, she once again falls under the sensual spell of her former lover, the handsome, arrogant Gilded Age robber baron Grey Chatwin. Investigating the mysterious death of Grey's wife, Lalla finds herself marked for murder, and risks losing her life as well as her heart.