Cody McFadyen. Shadow Man (2006) 384 pp.
After a tragic run-in with a murderous pyschopath that resulted in the deaths of her husband and young daughter, FBI agent Smoky Barrett is unsure if she’ll return as head of the bureau’s Los Angeles serial-killer team. Then a mysterious man calling himself Jack, Jr.—and claiming to be a descendant of Jack the Ripper—brutally rapes and kills a friend of Barrett’s in San Francisco. He addresses a subsequent letter to Barrett, all but daring her to come after him.
Setting: San Francisco; Los Angeles