Maggie Shayne

Retirement has never been so lethal. It begins the day Bonnie Tucker kills the wrong man-or rather, exactly the right one... Retired teacher Bonnie Tucker is the last woman in town you'd suspect of murder. But some men have it coming, and when one of them ends up dead, she does what any sensible woman would do-she calls her three best friends. Between them, Diane, Christine, and Rosie have decades of patience and a frankly useful knowledge of the local cemetery.
At their age, you get on the mailing list. One body, they can handle. The trouble is, someone was watching-and the new detective in town happens to be Bonnie's son.