Agatha Christie - The Murder Of Roger Ackroyd -... Link

Dr. James Sheppard is the murderer.

When Poirot assembles the suspects in the final chapter, he doesn’t produce a forgotten clue or a surprise twin. He produces logic. He points out that only Dr. Sheppard had the opportunity, the medical knowledge to administer poison, and—most devastatingly—the narrative control.

But there’s a catch: We are inside the doctor’s head . Dr. Sheppard narrates every clue, every red herring, every interview with Poirot. We believe we are solving the mystery alongside him. We are not. To discuss this novel seriously, one must address the elephant in the library. Major spoilers follow.

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Enter Hercule Poirot, Christie’s famous Belgian detective, who has retired to the village to grow vegetable marrows. The cast is classic Christie: a mysterious widow (Mrs. Ferrars) who has just died of an overdose, a blackmailer, a disinherited stepson, a parlor maid with secrets, and a household full of plausible suspects.