A Hercule Poirot mystery. Agatha Christie was a genious. Every book of hers that I have read were excellent. I may go back and read them in series order, just for fun. Each book is an entity to itself, no order is required, I just like to read books in order of when they were written. :)
One day, Poirot notices 3 mistakes in his letter. When he asks
his secretary, Miss Lemon, what's wrong, she tells him about the curious thefts in the
boarding-house her sister is manager of and concern for her
sister is interfering with Miss Lemon's typing abilities. Poirot interviews the residents
and finds the culprit. After everything is settled and the culprit is
about to be engaged, murder strikes. The police write it off as a suicide. Poirot investigates and comes across another murder many more twists and turns.