Damage Done by Hilary Davidson

It's been a long time since I have read a book with so many plot twists and turns, and yet the puzzle in Damage Done is pieced together very slowly. Lily Moore receives a phone call while in Spain telling her that her sister, Claudia, has been found dead in her apartment in New York City. Although estranged from her drug-addicted sister for quite some time, Lily goes back to handle the arrangements. However, things go from bad to worse when, after the initial viewing and autopsy, it is determined that the body found is not that of her sister. So where is Claudia?

Karen