The wrong quarry /
Collins, Max Allan,author.
"Quarry doesn't kill just anybody these days.  He restricts himself to targeting other hitmen, availing his marked-for-death clients of two services: eliminating the killers sent after them, and finding out who hired them--and then removing that problem as well.  So far he's rid the world of nobody who would be missed.  But this time he finds himself zeroing in on the grieving family of a missing cheerleader.  Does the hitman's hitman have the wrong quarry in his sights?"--P. [4] of cover.
"Quarry doesn't kill just anybody these days.  He restricts himself to targeting other hitmen, availing his marked-for-death clients of two services: eliminating the killers sent after them, and finding out who hired them--and then removing that problem as well.  So far he's rid the world of nobody who would be missed.  But this time he finds himself zeroing in on the grieving family of a missing cheerleader.  Does the hitman's hitman have the wrong quarry in his sights?"--P. [4] of cover.
Assassins
Missing persons