Ed McBain's latest installment in the 87th Precinct series finds the detectives stumped by a serial killer who doesn't fit the profile. A blind violinist taking a smoke break, a cosmetics sales rep cooking an omelet in her own kitchen, a college professor trudging home from class, a priest contemplating retirement in the rectory garden, an old woman out walking her dog-these are the seemingly random targets shot twice in the face. But most serial killers don't use guns. Most serial killers don'