As the Pig Turns by M.C. Beaton

Policeman Gary Beech has been making enemies, giving tickets for questionable offenses. When private detective Agatha Raisin and her friends attend a festival in the small village of Winter Parva, Agatha notices that the pig on the spit is sporting a tattoo with the word "Amy" which leads to the discovery that it's not a pig, but the body of Gary Beech. Agatha is then hired by Beech's ex-wife, Amy, to find out who's responsible for his death. But when Amy is found murdered, Agatha and her employees (Toni, Patrick, and Phil) and her friends, Roy, Charles, and even ex-husband, James band together to find out the truth even if it means putting their own lives in danger. As the Pig Turns is the latest mystery in the long-running Agatha Raisin series, which is always a treat.