Bantam of the Opera: A Bed and Breakfast Mystery by Mary Daheim

In Bantam of the Opera fans of  Bed and Breakfast inns will enjoy the trials and tribulations of owner Judith McMonigle Flynn when she books obnoxious opera start Mario Pacetti and his people at Hillside Manor.  Judith quickly learns that unlike her other guests, this group is made up of voracious eaters and expect use of her kitchen along with expensive snacks.  Life becomes more exciting when threatening notes appear on the porch and then Pacetti drinks poison during his first performance and dies onstage.  Judith teams up with her opera loving cousin Renie to  find the murderer so the guests can leave and she can get on with her business and her life with her new husband.