Point of Origin — Patricia Cornwell

The devastating fire tore through the horse farm, destroying everything it touched. Picking through the wreckage, Dr. Kay Scarpetta uncovers human remains--the work of an audacious and wily killer who uses fire to mask his brutal murders. And when Scarpetta learns that her old nemesis Carrie Grethen has escaped from a hospital for the criminally insane and is somehow involved, the investigation becomes personal. Tragedy strikes close to home. And Scarpetta must match Grethen 's every move with one of her own to douse the inferno of evil that threatens everyone around her... .