Book excerpt: In From Potter's Field, #1 New York Times bestselling author Patricia Cornwell enters the chilling world of Virginia's Chief Medical Examiner Dr. Kay Scarpetta—and a bold, brilliant killer from her past. Upon examining a dead woman found in snowbound Central Park, Scarpetta immediately recognizes the grisly work of Temple Brooks Gault. She soon realizes that Gault's murders are but a violent chain leading up to one ultimate kill—Scarpetta herself.