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A novel by Creator/AgathaChristie published in 1932, featuring Literature/HerculePoirot.

While staying at a Cornish resort, Poirot meets Nick Buckley, the beautiful young mistress of End House, who has escaped several attempts on her life. He decides to try to protect her and track down the would-be killer, and comes to End House where he meets an assortment of mysterious characters: Nick's cousin and lawyer Charles Vyse, the housekeeper Ellen, Mr and Mrs Croft who are leasing the cottage on Nick's property, Nick's friends Frederica Rice, Jim Lazarus, and George Challenger, and lastly her cousin Maggie, whom she asked to stay with her at Poirot's suggestion. On the night of a firework party, a corpse is found, wearing Nick's shawl...

The novel was adapted for a double episode in series two of ITV's ''{{Series/Poirot}}'' starring David Suchet in 1990; this episode was generally very faithful to the novel. Tropes unique to this adaptation can be found on the series page.

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!!This novel provides examples of the following:

* BetterToDieThanBeKilled: The killer commits suicide through the use of [[spoiler:cocaine hidden in her wrist-watch]], which is a much easier death than being hanged.
* BitchInSheepsClothing: [[spoiler:Nick. She appears to be in danger, but it's all an act to cover up her murder of her cousin as another attempt on her life]].
%%* CoincidentalDodge: [[spoiler:Subverted.]]
* CorruptTheCutie: Implied as a backstory, when [[spoiler:in his summation, Poirot describes how Nick began to hate Freddie because Freddie has, as Poirot puts it, "the knack of winning love, and ''keeping'' it", and also how her love for End House drove her to murder Maggie to claim her inheritance.]]
%%* DrugsAreBad: Played with.
* EveryoneIsASuspect: Surprisingly -- and yet totally believably -- subverted. [[spoiler: Poirot compiles a seemingly complete list of suspects, even giving each one of them a letter of the alphabet, and yet in the end it turns out that neither the main culprit (despite being there and well-known by everybody for all the time) nor one of the minor ones are on it.]]
* FakingTheDead: [[spoiler:Nick]] is persuaded by Poirot to do this, in order to expose [[spoiler:the Crofts]].
* {{Foreshadowing}}: While discussing the possible motives for murder, Poirot briefly mentions [[Theatre/{{Othello}} Iago]] and how ingenious his methods of killing were. In Literature/{{Curtain}}, Poirot must face a killer who [[spoiler: had perfectly mastered Iago's methods and is able to commit murder through other people while he himself remains legally innocent.]]
* ForgingTheWill:
** When Charles Vyse reads out Nick's will, everyone was surprised to hear that she had left her entire fortune to [[spoiler:Mrs Croft]]. This turns out to be a forgery.
** Another, less direct version as well. [[spoiler: While Nick doesn't present a forged will, she does try to forge being the "Magdala Buckley" mentioned in the will when it actually referred to her cousin]].
* HatDamage: While Nick was conversing with Poirot, a bullet was apparently shot at her, narrowly misses her head and hits the rim of her hat instead. [[spoiler:However, it is almost certain that Nick had deliberately damaged the hat and left the bullet for Poirot to find in order to create an illusion that someone is after her life.]]
* HauntedHouse: End House has shades of this. [[spoiler:Lampshaded when it is suggested that the house's influence made Nick succumb to evil.]]
* HeManWomanHater: Michael Seton's uncle Matthew disliked women, which is why Michael had to keep his engagement a secret.
* InheritanceMurder: This is a suspected motive behind the attacks on Nick, as she is engaged to the millionaire Michael Seton, who had left all his fortune to his fiancee. [[spoiler:While Seton's money was indeed the motive for the murder, the truth plays out differently from what was presupposed. Michael was engaged, not to Nick, but to her cousin Maggie. As they have the same name -- Magdala Buckley -- Nick murders her cousin in order to claim the inheritance Michael had left for Maggie]].
* JustOneLittleMistake: The use of a love letter that does not mention [[spoiler:Nick's serious operation, despite being dated for that time. Also, her RevealingCoverup at the end.]]
%%* KillTheCutie: Poor [[spoiler:Maggie]].
* KnownOnlyByTheirNickname: Nick, Freddie, and Maggie. [[spoiler: The fact that both Nick and Maggie have the first name Magdala but neither use it is what makes the plan possible]].
* LostWillAndTestament: The will of Nick is missing, only to turn up after her [[spoiler: faked]] death, and it turns out that it's a fake made by [[spoiler:the Crofts]].
* MakeItLookLikeAnAccident: This trope appears to be in play for the attempts on Nick's life. [[spoiler:This is her cover for the crime she is planning, which is the murder of her cousin]].
* MurderByMistake: [[spoiler:Inverted. Nick dressed up her murder of Maggie as this.]]
* NeverSpeakIllOfTheDead: Nick tries to invoke this with Freddie's dead husband, [[spoiler:ostensibly to spare Freddie, but really to cover up her own murder]].
* RevealingCoverup: [[spoiler:Nick]] tries to frame [[spoiler:Freddie]] by placing a gun in her coat, unaware that [[spoiler:she]] is being watched.
* SickbedSlaying: The poisoned chocolates sent to [[spoiler:Nick. Subverted in that not only is she not dead, but she sent them to herself as a ruse.]]
* SpookySeance: A dramatic one that culminates in [[spoiler:Nick entering the room as her own ghost]].
* TomboyishName: Nick Buckley and Freddie Rice.
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