The Moving Finger by Agatha Christie

The indomitable sleuth Miss Marple is led to a small town with shameful secrets in Agatha Christie’s classic detective story, The Moving Finger. 

Lymstock is a town with more than its share of scandalous secrets—a town where even a sudden outbreak of anonymous hate mail causes only a minor stir.

But all that changes when one of the recipients, Mrs. Symmington, commits suicide. Her final note says “I can’t go on,” but Miss Marple questions the coroner’s verdict of suicide. Soon nobody is sure of anyone—as secrets stop being shameful and start becoming deadly.