Keller has an unpleasant job to do. He does it very well but does not particularly enjoy killing people. Keller does evil work but is actually a nice, apparently normal guy who readers can’t help but root for. Keller is now looking forward to retirement with his beloved stamp collecting hobby when he reluctantly agrees to “the last job.” You know trouble will ensue when something is the last job. And it does. But Keller is always careful where he leaves his prints. Then an assassination occurs and Keller wonders, “If you wanted to frame someone for murder, why not pick a murderer? Hire him to kill some nonentity, and time it so that he’s in the right place at the right time, and then frame him for the real killing, the important killing.” Shades of our collective paranoia.