The Big Four - Empat Besar

His personality is so distinctive—what inspired her to give him such unique quirks and methods? I'm curious about the creative process behind his character.

The story jumps across different countries, which kept me on my toes. Was this a common trope for Christie or specific to this book?

It felt like a different kind of threat compared to her usual cases—more global and high-stakes. What do you think influenced this choice?