I have read all the Nina Reilly books in order, and this is the worst. It does not follow the usual formula, which is investigating complex crimes, tracking down suspects, unraveling clues, going through myriad twists and turns and finally solving the mystery. This book is a soap opera - long narratives of the suspects (there are about a dozen of them), their marital and family problems, their motivations, and their phoney lives. The actual crime, arson, is just a backdrop.
Nina has had a difficult personal life: having a love affair with a transient Swede and becoming an unwed mother, marrying and divorcing a man who was not the father of her child, marrying and becoming widowed (covered in the book ACTS OF MALICE), and now trying to make a success of it with her investigator, Paul, even though she does not really love him.
Be wary of the title - it implies that there is something not quite right with the murder victim. You should all be aware that a positive ID (via DNA, dental records, or finger prints) is usually required before you presume the identity of someone. If the author does not provide such an ID, be wary. In this case Wish repeatedly tries to tell Nina that something is wrong with the ID of the victim, but she does not listen, so she is thrown off course, which is frustrating to the reader.