Live Bait by P.J. Tracy
2nd title in Monkeewrench series.
Elderly Jews are being murdered in Minneapolis, and detectives Leo Magozzi and Gino Rolseth work to solve the case. On the surface it appears to be some kind of crazy serial killer who is going after old people. But as they delve into the details in the victims lives it becomes apparent that the people who were being killed have more in common than what meets the eye.
We also have the original characters from the Monkeewrench crew in the story but in a much more background mode.
While the mystery was not as good, the storyline and development of the police detectives are excellent as always. Plus we see more develop between Leo and Grace.
Book five comes out in a few months so I'm re-reading this as it's been a few years. Can't wait!