One, Two, Buckle My Shoe (1940) is an Agatha Christie mystery featuring the famed Belgian detective Hercule Poirot. The story opens with the seemingly straightforward death of Poirot's dentist, Dr. Morley, ruled a suicide—on the same day that Alistair Blunt, one of England's most powerful bankers, vanishes after his appointment. When a patient later dies of an overdose and another body is discovered, Poirot suspects a carefully concealed murder plot. As he investigates, he unravels a web of blackmail, secret identities, and political intrigue hidden behind ordinary appearances. Guided by fragments of the familiar nursery rhyme, Poirot exposes a killer whose motive is as simple as it is chilling.
