Read "The Big Four" by Agatha Christie online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
It was all very well for Poirot to say that we were acquiring information all the time and gaining an insight into our adversaries' minds -- I felt myself that I required some more tangible success than this.
Since we had come into contact with the Big Four, they had committed two murders, abducted Halliday, and had been within an ace of killing Poirot and myself; whereas so far we had hardly scored a point in the game.