Someday the Rabbi Will Leave by Harry Kellerman is just £0.99 at Amazon UK just now.
An interfaith wedding, local politics, and a lethal hit-and-run case keep Rabbi Small busy in this mystery in the New York Times–bestselling series.
The ninth in the series, but they are all stand-alone mysteries. I do recommend them in series order as unlike many detective series, in this series we see the detective age as time progresses.