There are 80 books in the Hercule Poirot Mysteries series.
The Hercule Poirot Mysteries series does not have a new book coming out soon. The latest book, A Haunting in Venice (Book 41), was published in November 1969.
The first book in the Hercule Poirot Mysteries series, The Mysterious Affair at Styles, was published in October 1920.
The Hercule Poirot Mysteries series primarily falls into the Mystery genre.