The Boyfriend by Thomas Perry

 

This is a mostly-standard thriller novel with a pretty interesting twist--there's a cop after a serial killer, who he thinks is just a guy killing high-end escorts. Turns out he's a hired hitman who lives with high-end escorts while he's doing pre-killing work, then kills them on his way out of town; he lives off the grid while he's sharing their home, then he removes the only witness. Of course, he's leaving extra dead bodies around, which turns out to be the flaw in his plan. Perry does his typical good job of conveying the various sorts of mundane--sometimes even tedious--things people do to get into the position of being the characters they are in his novels, and he does a really good job with the characterizations in this one--all the escorts are treated as people, and there's one who's given some interesting depth and extra nuance. The story moves with Perry's typical excellent rapid pace. Very much Perry at the top of his game.