In "The Big Four", Agatha Christie gave him a mysterious "twin brother" named Achille
[DOC] [TLE] Book review of The Big Four by Agatha Christie ... - Good Mystery [PAR] Jun 15, 2015 ... Book review of The Big Four by Agatha Christie, featuring Hercule Poirot, with 
links ... that this extravagant offer was simply a means to get him out of the way.