Hickory Dickory Dock by Agatha Christie

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. :)

Synopsis:
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.