Busy Body by M.C. Beaton

John Sunday of the Mircester Health and Safety Board is ruining everyone's lives with his nitpicking rules and regulations, so it's no surprise to anyone that he's found murdered. The prime suspect, millionairess Miriam Courtney, hires Agatha Raisin's detective agency to find Sunday's killer. But soon, Miriam is found dead too. Did the same person murder both victims or are Agatha and her team looking for two different killers? Busy Body is another enjoyable entry in the long-running Agatha Raisin series.