What was the effect for Poirot and his investigation of having James, the murderer, be his right hand man during the investigation? Did James hamper the investigation in any way?

What did James do to influence the investigation, and how did he play with the clues in order to frame Ralph and keep himself looking innocent?

Why did Poirot offer James a way out at the end? What does that tell us about Poirot's character?

Compare and contrast Poirot and Inspector Raglan. Discuss how their personalities and investigative methods differ. How does that author juxtapose Inspector Raglan with Poirot?

Describe the relationship James and Caroline have. How much do they really trust each other?

What clues does the author plant in the novel that hint at the identity of the true murderer?

Discuss the surprise ending of the story. What is your opinion about...