All the Bad Stuff Comes in Threes 1st edition

Not your average Miss Marple, Alma's short-term memory fails her more often than not. Even so, she's learned a thing or two in her 91 years. She knows that nothing is as important as one's reputation in the community. Furthermore, it's clear that the bad stuff always comes in threes. Could she really be expected to remember to tell her son that she had to work her way around an annoying dead body to find her club gift? After all, the fact that Alma remembered the gift at all should keep her friends from thinking she is getting old. As they probe this community of respectable but water-reliant individuals, can mellow Sheriff Pat Garrett and his firecracker deputy McCracken discover the killer of the low-life water thief found in Alma's shed?