Volunteer for Murder. A Myrtle Clover Cozy Mystery, #28

The golden years just turned deadly. When Tippy Chambers signs Myrtle up for a volunteer shift, Myrtle finds herself at Greener Pastures Retirement Home helping set up a 1950s sock hop. The party is complete with paper records, poodle skirts, and Shannon: a volunteer coordinator who speaks to octogenarians as if they're particularly slow preschoolers. Not everyone appreciates the approach. The party ends a bit early when Shannon's found murdered.
It's difficult to mourn someone no one actually liked, but someone liked her even less than Myrtle did. Now the residents of Greener Pastures, none of whom are as frail or harmless as they appear, are all looking sideways at each other. With her son Red intent on keeping her out of it and her neighbor Miles intent on keeping his blood pressure down, Myrtle navigates the complex social undercurrents of retirement home life.
Old grievances run deep here. Secrets are carefully maintained. When a second death makes clear the killer isn't finished, Myrtle realizes she's been looking in exactly the wrong direction. Precisely where someone wanted her looking. In a place full of people who look like someone's grandparent, the hardest part of solving a murder is knowing which grandparent to worry about.