This is one of my favourites of Agatha Christie’s murder mysteries. The murder had been months in the planning and execution. It was meticulously thought through with near flawless execution. It was to throw Scotland Yard’s Superintendent Battle off the real murderer. There were elements of alibi, motive of the murder, trails of physical evidences, and interviews of all parties concerned.
Superintendent Battle had to deploy his knowledge of criminal psyche to get at the real suspect. As the story progresses, it points towards a particular person as the most likely murderer. Then an alibi threw the investigators off to square one. The detailed murder plan involved a few steps of “what if” scenario happening. The murderer had all angles and eventualities covered. One could not be faulted when one was led onto a wrong trail.
Towards Zero refers to events coming towards Zero Hour where all parties of the case were present to witness the unveiling of the ingenious plan and to nail the true murderer.