A brand new murder mystery featuring Agatha Christie's iconic detective Hercule Poirot, with official backing from Christie's family. Written by Hannah, the bestselling author of the Culver Valley crime novels, which have been adapted into the ITV series }Case Sensitive{. Poirot is plunged into a mystery set in 1920s London, one that can only be solved by his 'little grey cells'. More than 2 billion copies of Christie's novels have been sold around the world.