Secret Star book by Nora Roberts

Lieutenant Seth Buchanan is astonished when the beautiful victim of his homicide investigation turns up—very much alive—at the scene of the murder. Grace Fontaine is keeping secrets, ones that should have killed her, but the notorious heiress refuses to reveal anything. The cool, controlled cop never lets his feelings get in the way of his job, and with a killer at large, Seth can’t afford any distractions. But there’s something irresistible about Grace…and eventually Seth finds it hard to remember there’s any mystery more important to solve than that of Grace herself.