There are 2 books in the New Hercule Poirot Mysteries series. The newest book is Closed Casket which came out in 2017.

1
The Monogram Murders

By Sophie Hannah , Agatha Christie ,

Book cover of The Monogram Murders: A New Hercule Poirot Mystery

The new Hercule Poirot novel - another brilliant murder mystery that can only be solved by the eponymous Belgian detective and his 'little grey cells'.

Since the publication of her first book in 1920, Agatha Christie wrote 33 novels, two plays and more than 50 short stories featuring Hercule Poirot.…

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2
Closed Casket

Book cover of Closed Casket: The New Hercule Poirot Mystery

Hercule Poirot returns in another brilliant murder mystery that can only be solved by the eponymous Belgian detective and his 'little grey cells'.

'What I intend to say to you will come as a shock . . .'

Lady Athelinda Playford has planned a house party at her mansion in…