Stalking Horse — Sam Reaves

In the fifth book of the Cooper MacLeish series, Cooper is making his living chauffeuring wealthy clients around Chicago while his wife Diana is pursuing her literary passion in graduate school. Diana has a new best friend in classmate Isabel Albala, the wife of a high-powered lawyer. A stalker is making Isabel's life miserable, and when Cooper confronts him, bad things happen. The stalker may not be what he seems, and once again Cooper is in the crosshairs.