End in tears : a Wexford novel / Ruth Rendell.

Enhanced descriptions from Syndetics:

At first there was no reason to link the killings. The first one, months earlier, seemed totally random: a lump of concrete pushed off an overpass onto a passing car. By contrast, the gruesome bludgeoning death of Amber Marshalson, returning home late from a night out clubbing with friends, was obviously calculated. The killer had been seen waiting for the girl in a nearby wood. But when Chief Inspector Wexford discovers that Amber had been the driver right behind the crushed car--and that she'd been driving a silver Honda, while the car in front of her was a gray Honda--he knows that someone wanted the teenager dead badly enough to kill twice to get the job done. And as it turns out, this murderer's plans are only just getting underway. Can Wexford unravel the complex knots that connect these murders in time to save future victims? Or is he, as he begins to fear, losing his touch and fast becoming a relic of another time? Long beloved by readers for her deft weaving of wonderfully meticulous characterization, dark humor, and trenchant social commentary into gripping and fast-paced plots, Ruth Rendell is in top form with End in Tears. Taking off from the first page with back-to-back murders and ending with one of Wexford's own officers in mortal danger, End in Tears touches on issues of class, race, parenthood, aging, and gender roles as it brings the traditional British whodunit into the twenty-first century. Also available as a Random House AudioBook, Large Print edition, and eBook