The Night Hawks by Elly Griffiths - this is the latest in the Ruth Galloway series, and now Ruth is firmly established back in Norfolk, and has been promoted to Head of Archaeology at the University of North Norfolk. Daughter Kate is doing well back at her old school, and life seems fairly settled. Until..... what looks like a murder/suicide takes place at a remote farm, and the body of a young man is found on a beach, which also turns out to be murder. Both his death and that of the couple at the farm lead back to the Night Hawks, a group of metal detectorists who hunt at night, as it's quieter. Then a research facility in Cambridge comes into focus, as the man involved in the murder/suicide incident was in charge of a research programme there, and it looks like everything is connected, somehow. Throw in a mysterious black dog seen around the farm, and Ruth's new lecturer, who is at best shifty despite managing to be vulnerable at the same time, may also have something to hide. DCI Nelson charges around as usual, scoffing at the local legend of the black dog, even when everything seems to point back to Black Dog Farm, and it all builds to an exciting climax with a few chapters ending on a cliffhanger. Another enjoyable read, with it's usual blend of humour and slight cynicism! 8/10