Gaslighting unsettles us because it works on the level of certainty. It distorts the truth and chips at confidence until a familiar world becomes unstable.
In crime fiction, that shift becomes the perfect engine for suspense. We recognise the tactics even before the characters do. We feel the pressure when someone begins to doubt their own memory. We know the danger long before the threat becomes visible.
In domestic noir, gaslighting fits naturally because the threat usually comes from someone trusted.
The home should be a sanctuary. When it becomes a stage for manipulation, the betrayal carries far more weight. A misplaced item becomes a warning. A repeated comment becomes a subtle attack. A small lie becomes a crack that widens through the entire story.
I use gaslighting repeatedly in my novels because it mirrors the emotional hazards of everyday relationships. It isn’t loud. It isn’t dramatic. It works through suggestion, silence and pressure. It keeps characters unsteady, and it keeps us unsteady with them.
In Her Daughter’s Mother, gaslighting forms the backbone of Sally Bentham’s unravelling.
Sally begins the story clinging tightly to her identity as Amelia’s adoptive mother. When Robyn Clarke enters their lives as Amelia’s birth mother, that identity is pushed and twisted until Sally no longer trusts her own instincts.
Robyn is warm, capable and universally liked, which makes the manipulation quieter but far more effective.
Sally questions whether she misheard conversations. She wonders whether her reactions are unreasonable. She doubts her judgement even as she sees Robyn drawing Amelia closer each day.
That erosion of certainty forces us into Sally’s perspective. We know something is wrong, but each of Robyn’s small, strategic comments makes Sally look unstable. The more she insists she is right, the more isolated she becomes.
The Teacher uses gaslighting in a different way through the character of Isabel Draper.
Isabel begins the story confident in her role as a mother and partner. The arrival of Daniel Craven disturbs that balance immediately. Daniel is admired by the entire community. Olivia adores him. Isabel’s husband befriends him. The village sees him as dependable and steady.
This gives Daniel immense power long before he reveals his true intentions.
When Isabel raises concerns, she is dismissed as anxious or jealous. Daniel never needs to deny anything directly; he only has to shift the tone of a conversation or present himself as the calm voice in contrast to Isabel’s rising panic.
Slowly, Isabel begins to question her own instincts. She knows something is wrong. She sees Daniel watching her daughter. But with no support from the people around her, she begins to doubt the accuracy of her own fears.
In The Nanny’s Secret, gaslighting spreads through the entire household.
Emma begins the story exhausted and overwhelmed by motherhood.
When Sophie arrives, everything improves. Her husband relaxes. Her son is happier. Her friends comment on how lucky she is.
This creates the perfect environment for Sophie to manipulate Emma’s sense of reality. Sophie knows private details Emma never shared. She repeats Emma’s late mother’s lullaby. She answers questions before Emma finishes them.
These small intrusions make Emma falter. As those around her turn against her, Emma’s confidence collapses.
Sophie doesn’t need to confront her directly; she only needs to make Emma feel watched, outmatched and slightly off balance. The tension grows because Emma no longer knows which fears are real and which are planted.
Gaslighting becomes especially powerful when paired with an unreliable narrator. When characters cannot trust their memories, and we cannot fully trust them either, the story gains a shifting, unstable quality.
Each scene becomes layered with uncertainty. Each assumption becomes questionable. Each moment carries more than one possible meaning.
In Her Daughter’s Mother, Sally’s exhaustion and worry make her vulnerable to manipulation. She knows Robyn is undermining her, yet she also knows she is tired and stretched thin. Her perspective becomes shaky, deepening the story’s tension. We believe her, but we also see why others don’t.
In The Teacher, Isabel’s drinking becomes an issue as Daniel draws power from her distress. She second-guesses herself at the exact moments she needs clarity most. Her unreliability mirrors the psychological trap Daniel has built around her.
The Nanny’s Secret amplifies this even further. Emma’s grief and fatigue create natural gaps in memory and perception, and Sophie uses those gaps as leverage.
Emma becomes unsure which thoughts are her own. The narration itself grows unstable, giving the novel its claustrophobic tone.
Gaslighting works so well in crime fiction because it shapes pacing. It slows scenes down when tension needs to simmer. It speeds them up when panic rises. It forces characters to circle the same doubts repeatedly, each time attaching new fear to familiar details.
We feel trapped with them. We feel the circular thinking. We feel the frustration when their warnings go unheard.
Morecambe Bay and the surrounding towns in my novels deepen this effect. The locations feel ordinary, familiar and lived in. When characters begin to lose their sense of reality in places they know intimately, the emotional shock is sharper. A street they’ve walked for years suddenly feels dangerous. A school gate becomes a site of unease. A home becomes a place they no longer trust.
Gaslighting also allows the antagonist to remain hidden for longer. They don’t need violence or dramatic confrontation. They only need the right word at the right moment. They need to make the victim hesitate long enough to doubt themselves. That hesitation sustains the narrative and keeps tension tight.
The true impact of gaslighting in fiction rests on one idea: identity.
Manipulating reality becomes a way of manipulating the self. When a character loses the ability to trust their own senses, they lose their foundations. That fracture is compelling because it raises the stakes beyond physical danger. It touches something personal and familiar to many of us.
Gaslighting, combined with an unreliable narrator, creates the ideal structure for domestic noir. It brings depth and instability. It turns homes into uncertain places. It turns relationships into puzzles. It turns characters into shifting shadows of themselves.
That’s why I return to it so often in my stories. Not for spectacle, but for truth. Gaslighting reflects the subtle, relentless pressures that shape real lives. It reveals how easily trust can be damaged. It exposes how quickly certainty can be taken from us. And it delivers the psychological tension that domestic noir thrives on.
FAQ: Gaslighting in Crime Fiction
What is gaslighting?
Gaslighting is a form of psychological manipulation designed to make someone doubt their own memory, perception or sanity. In fiction, it often appears as a character subtly twisting facts, denying conversations or reframing events until the victim no longer knows what is true.
Where does the term come from?
The term comes from the 1938 play Gas Light (and its later film adaptations), in which a husband manipulates his wife by dimming the gas lamps in their home and insisting she is imagining the change. The story established gaslighting as a tactic used to destabilise and control.
Why is gaslighting effective in crime and domestic noir?
It creates tension without physical violence.
It forces characters—and readers—to question everything.
It allows villains to operate in plain sight, using charm and subtlety rather than overt threats.
It makes ordinary settings feel dangerous because the danger is psychological, not external.
How can you tell if gaslighting is being used in a novel?
Look for signs such as:
• A character denying conversations or events that clearly happened.
• A victim repeatedly apologising or second-guessing themselves.
• A manipulator insisting the victim is “overreacting” or “imagining things.”
• Small inconsistencies that only the protagonist seems to notice.
• Other characters siding with the manipulator because they appear calm, rational or charming.
• The protagonist becoming isolated as their credibility is quietly undermined.
Which types of characters typically use gaslighting?
Controlling partners, charming authority figures, obsessively attached acquaintances, manipulative friends or family members—anyone who benefits from destabilising another person’s confidence.
Why do readers find gaslighting so compelling in fiction?
Because it feels plausible.
Because we’ve all experienced moments of doubt.
Because watching someone fight to reclaim their sense of reality is both tense and emotionally gripping.
And because the reveal—when the truth finally breaks through—is deeply satisfying.