Chattie Cornfeld was murdered while jogging in the park. At first it looked as though she was the latest victim of the 'Park Killer', but it doesn't take Slider and Atherton long to establish that someone was trying to pass the killing off as part of a pattern: only the pattern doesn't fit, this one was personal.
This is a much-underrated series and yet one I very much enjoy. Bill Slider and his fellow officers reminds me a bit of McBain in that they are diverse, human and seem real. The dialogue is excellent and the procedure interesting. There is humor in the writing and yet thoroughness. This is an excellent series and one I highly recommend.