An aging and grumpy Maigret is called to a large, patrician home that has seen better days in Ivry when an occupant is found shot in bed.  Burglary is suspected due to a few clues, but Maigret dismisses those. In a day or two he digs into the family’s history, secrets, and intrigue and identifies the killer as the sister-in-law whose fortune had been being used to prop up the failing biscuit business and who became dispensable when she started to file for divorce.  This is a neat little story in which Maigret is confronted by the new generation of prosecutors and realizes that he and his approaches are nearing the end of his career.  Much musing about his ‘method’ which is basically to pry open the inner person and how they interact in any particular setting until the murderer is exposed.  A good one.