Closed Casket:

Closed Casket is a work of detective fiction by British writer Sophie Hannah, featuring Agatha Christie's Hercule Poirot. Hannah is the first author to have been authorised by the Christie estate to write new stories for her characters. Hannah's work closely resembles the Golden Age of Detective Fiction in its structure and tropes. Closed Casket even includes a plan of the house in which the murder takes place; such plans were sometimes used in Golden Age novels to aid the reader in their solving of the mystery puzzle.