57 pages • 1-hour read
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Content Warning: This section of the guide includes discussion of ableism, death by suicide, child death, mental illness, and death and illness.
Lacoste points out that Jean-Guy and Gamache might be overeager to see Abigail as a suspect in Debbie’s death. Because of how strongly they disagree with Abigail’s theories of eugenics, they might be biased toward suspecting her as the killer. Gamache continues to scrutinize an old photo of Paul Robinson, taken shortly before Maria died. He notices from material in the background that Colette might have been with him around this time and wonders if she could have killed Maria. He also deduces that Colette and Paul Robinson once worked together on a whimsical research project called Spurious Correlations, intended to reveal that data and statistics can be used in misleading ways. He orders Colette’s home to be searched.
While the search takes place, Gamache and Jean-Guy question Colette about the photo of Paul Robinson. She admits that she took it at a conference they both attended a few days before Maria’s tragic death. They also find a book Paul gifted to Colette, with an inscription dated the day before his death. Inside the book, they find a letter from Paul. Paul explains that he killed Maria and then made her death look like an accident. Colette admits that she received the book and letter shortly after Paul’s death, and this confirmed her sense of responsibility to care for Abigail.
When they ask if Colette ever shared the letter with Abigail, she explains that she showed it to Abigail shortly after the funeral. Debbie was present when Colette shared this information with Abigail and had a stronger reaction to the news that Paul Robinson had murdered his daughter. Gamache presents his theory: Colette murdered Debbie because she feared Abigail was going to be successful in her attempt to blackmail Vincent Gilbert into endorsing her theory. Since Colette’s husband has dementia, she would have motive to protect him and others who are targeted by Abigail’s theory. By murdering Debbie, Colette would have hoped to get access to the documents used in the blackmail plot.
Meanwhile, Lacoste questions Vincent Gilbert under the guise of asking for information that could help to incriminate Abigail Robinson. She then meets with Abigail, asking about Maria’s death. Abigail explains that she and Debbie were at the house together, looking after Maria. They left for an errand, and Abigail arrived home to find her father with Maria, who was choking. Lacoste raises the possibility that Debbie somehow killed Maria, but Abigail finds the idea ludicrous.
Lacoste, Jean-Guy, and Gamache gather to discuss all of the new case information. Lacoste points out that the letter from Paul Robinson is ambiguous and doesn’t explicitly state that he killed Maria. They decide to send the letter for further analysis. Gamache asks Haniya if she killed Debbie, and Haniya continues to deny it.
Lacoste, Jean-Guy, and Gamache obtain a copy of an agenda, owned by Paul Robinson, that was also in Debbie’s drawer. However, it doesn’t help them understand how the events and relationships are interconnected. Gamache decides they need to question Colette again.
Lacoste, Jean-Guy, and Gamache go to Colette’s home and ask her to tell them about the day when she showed the suicide letter to Abigail and Debbie. Colette explains that Abigail read the letter and summarized it for Debbie. Gamache suggests that the vague and cryptic letter was actually Paul’s way of revealing that he knew Abigail killed Maria, and that he took the blame for his daughter’s action. However, Gamache speculates that Paul only got the truth half-right: He was right in assuming that someone killed Maria, but he wrongly believed Abigail was the killer when it was actually Debbie. Gamache explains that he believes that when Colette came to the same conclusion, she killed Debbie to protect Abigail. He takes Colette into custody.
At the inn, Gamache summons Haniya, Abigail, and Vincent downstairs. However, only Haniya responds. They quickly confirm that Vincent and Abigail are not in their rooms, but it is not clear where they have gone. Gamache notices boot tracks in the snow, leading toward the isolated cabin where Vincent lives. Gamache, Lacoste, and Jean-Guy rush to the cabin. A few minutes later, Colette and Haniya also arrive, although they were ordered to stay behind.
Abigail confirms that a few weeks earlier, she found the paperwork linking Vincent Gilbert to her mother’s suffering with Dr. Cameron. She came to Quebec to blackmail Gilbert with this documentation because she knew it would be the ultimate torture for him to publicly endorse theories that he personally found to be heinous. Gilbert confirms he knew nothing about these letters and was unaware of the material Debbie and Abigail had access to. As the discussion continues, Abigail seizes the gun and points it at Gilbert.
Abigail is prepared to kill Vincent Gilbert, claiming it would be an act of vengeance for his indirect role in the deaths of her parents and for murdering Debbie. Gamache counters Abigail’s accusation that Vincent is the killer, outlining another theory: While Debbie was the one to have killed Maria, Paul Robinson died by suicide mistakenly believing that his daughter was guilty. Debbie eventually confessed to Abigail that she killed Maria, and Abigail responded by killing her.
Abigail flatly denies this theory, and Gamache reworks his theory. He realizes that Paul Robinson’s cryptic note acknowledged Abigail’s true nature and accepted that she was the one who killed Maria. When Debbie finally understood that Abigail was guilty of Maria’s murder, the relationship between the friends became tense, and Abigail was afraid that her secret would be revealed. Gamache surmises that by the night of the party, Abigail was overwhelmingly afraid of the threat Debbie posed to her. When confronted with this theory, Abigail becomes extremely agitated and points the gun at Jean-Guy, taunting him and trying to provoke him into shooting her. Despite his hatred, Jean-Guy maintains his composure, and Abigail is arrested.
After the arrest, everyone goes their separate ways. Vincent Gilbert explains to Haniya that he did not take Abigail to his cabin to harm her: He wanted to privately apologize for the harm her mother endured. Vincent and Haniya both feel they may find some peace despite the suffering in their pasts. Colette has always known that Paul did not kill Maria. She initially hoped that it was Debbie who was guilty of the crime, but she eventually accepted that Abigail killed her sister and that Paul died aware of his daughter’s guilt. Nonetheless, she kept her promise to Paul to protect Abigail. Although the evidence is shaky, Gamache plans to charge Abigail with the murders of both Debbie and Maria. Haniya eventually decides to return to Sudan, having been finally embraced by the Three Pines community.
The final section of the novel increases the dramatic suspense and tension, particularly when Abigail and Vincent Gilbert slip away to his isolated cabin. This setting presents remote access, as Gamache and Jean-Guy can only reach it by snowmobile, and the isolated setting increases the odds of a violent climax to the central conflict. That it occurs in the middle of winter, with Abigail and Vincent tracked by footprints in the snow, increases the atmosphere of isolation, making the cabin a tense, small space for so much action to occur. The climax involves the key characters gathering for a final confrontation. With the tension at its height, Gamache articulates various theories that he has been constructing about Abigail’s culpability, finally arriving at the truth.
The revelation that Abigail is the murderer and that she acted from entirely selfish motives confirms the nature of her character and is consistent with her eugenics-based theories. She is revealed as decisively evil and driven purely by selfish motives; while her father couldn’t help loving her, he saw her true nature and knew intuitively that Abigail was responsible for the death of her sister. As Gamache summarizes, “[H]e didn’t believe it was you. He knew it was. He knew you” (420). This information about Abigail confirms that the repulsion many characters felt toward her was justified; however, it provides interesting nuance to the theme of Bias and Emotion Impacting Decisions. Gamache and others suspect Abigail of being evil long before they can factually prove it; they are guided by emotion and intuition, as Abigail’s public policies are a reflection of her private personality. The narrative resolution of Abigail’s guilt is conveniently aligned with the moral values espoused in the novel.
Penny uses this dynamic to explore how moral instincts, especially when influenced by love or fear, can preempt the arrival of hard evidence. Gamache’s emotional radar becomes both a strength and a liability throughout the case. The reader is prompted to consider whether emotional bias becomes a form of intuition, or whether it blinds investigators to alternate possibilities. By aligning Gamache’s gut feelings with the final facts, Penny ultimately affirms the ethical compass of her protagonist, but not without interrogating its reliability along the way.
Information about the role Paul Robinson played in concealing his daughter’s crime strongly develops the theme of Parental Desire to Protect Children. Paul faced a terrible conflict in which protecting one child would have meant sacrificing the other, and he couldn’t help loving Abigail despite her murderous nature. This decision reflects the novel’s exploration of how love can generate moral ambiguity and how characters may do the wrong thing for the right reason. His love and devotion to Abigail also sheds light on why Colette and Debbie continue to love her, even as they were increasingly aware of her terrible actions.
This moral ambiguity extends to Colette, whose entire arc reflects the conflict between personal loyalty and ethical truth. Colette’s promise to Paul to protect Abigail binds her to a lie that corrodes her ability to act freely. Penny shows how inherited debts of love can curdle into complicity, particularly when silence enables harm. Even Debbie—possibly driven by guilt over her own inadvertent role in Maria’s death—maintains a complex, fraught loyalty to Abigail until the truth becomes too much to bear. These tensions reinforce the novel’s bleak suggestion that protection, when misapplied, can be as destructive as cruelty.
While Abigail is decisively revealed as the villain, other characters achieve a form of redemption by the novel’s conclusion. Jean-Guy maintains his self-control even when Abigail tries to bait him into shooting her. While his love for his children has caused him to act rashly at other points, it motivates him to behave with integrity and discipline when stakes are the highest. The climactic conflict reveals the true nature of the characters involved in the stand-off, and Jean-Guy proves that he is a person of deep moral integrity. The forced confrontation about raising a child with a disability ultimately proves cathartic and healing for him: At the end of the novel, he initiates a conversation with his wife, telling her that he wants to explain “about how I once felt about Idola. About our decision” (430). This conversation will help Jean-Guy to feel more at peace with the emotional complexities of his life and the deep love he feels for his daughter. Jean-Guy’s journey also acts as a counterpoint to Abigail’s arc. Whereas Abigail is ruled by her inability to process vulnerability—hers, her sister’s, and society’s—Jean-Guy learns to confront the emotional discomfort of his daughter’s disability, especially as it is magnified by a person like Abigail, and to move through it rather than around it. In doing so, he embodies a different version of Parental Desire to Protect Children that is rooted in acceptance and courage.
This act of catharsis and sharing is also exemplified when Vincent Gilbert and Haniya exchange apologies and forgiveness: She symbolically forgives him on behalf of Abigail (whose mother he was complicit in harming) while he symbolically accepts her apology to the child soldier she was forced to kill in order to defend herself and escape. This exchange shows that two isolated characters who have largely rebuffed attempts to bond with others still crave connection and community. At the end of the novel, Haniya returns to Sudan because she achieved a true sense of community with the residents of Three Pines. Small gestures such as the hot chocolate she consumes and the hand-drawn card she receives symbolize the mutual care that has finally been achieved. While the novel acknowledges that crowds and groups can be manipulated to dangerous ends, it also offers a vision in which collectivity is the only way in which individuals can genuinely thrive.
This final movement toward reconciliation introduces a gentle subversion of the novel’s darker thematic arcs. Though many characters are damaged by secrets, abuse, and loss, Penny suggests that community can be a redemptive force through small, sincere acts of care. The relationship between Haniya and the town offers a hopeful close to a novel otherwise marked by violence, guilt, and deception. It positions forgiveness as a radical act that enables growth and healing.
The closing chapters, then, serve as a powerful synthesis of all three central themes: Bias and Emotion Impacting Decisions, Parental Desire to Protect Children, and Individual Rights in Conflict with the Collective Good. The murder mystery is resolved, but the emotional and ethical consequences linger. Penny doesn’t suggest that there is a clean answer to every moral question, but she does imply that love, community, and emotional truth are worth pursuing even when they hurt.



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