Heart of Glass Themes

by Jennifer Hillier

This analysis draws on moments from across the whole book and may contain spoilers.

Underneath its thriller plot, Heart of Glass is really about guilt and buried trauma. Barb and Cole carry the secret of Lorelei's death and Hawk's cover-up, and that shame shapes their estrangement for decades. It also digs into memory, reinvention, captivity, small-town complicity, and the true-crime machine that turns pain into content.

Here you'll find each major theme with concrete moments: Hawk's abuse and the town's silence, Cole's transformation from Nicolette, the cabin captives, and the docuseries exploiting trauma. Recurring symbols include Kylie's peridot ring, the Wonder Wheel, Polaroids, and masks and disguises that hide predators in plain sight.

Major Themes in Heart of Glass

Guilt, Secrecy, and Survivor's Trauma

Barb and Nicolette/Cole carry guilt over Lorelei's death and the cover-up engineered by Hawk, and that secret shapes their estrangement for decades. Barb's survivor guilt and the friends' buried truth drive the memoir, the investigation, and the novel's resolution when Marty's journal reveals they did not actually kill Lorelei.

Barb recalls police telling her, 'You're very lucky. It could have been you,' and her shame that she felt relief she wasn't chosen.
Barb admits she still has not told Dr. Leto the truth after six years of therapy, and she thinks her guilt over Lorelei keeps her trauma-bonded to Seaside.
Barb tells Nicolette there was no way to reveal one secret without revealing it all, referring to Lorelei and Hawk.
Marty's journal reveals Lorelei woke up after Barb and Nicolette left and was alive before Hawk strangled her, so Barb and Nicolette learn they did not kill Lorelei.

Memory, Buried Trauma, and Narrative Truth

The past erupts through memories, therapy, case files, journals, and TV reconstructions. The novel contrasts emotional memory with official narrative, as Cole says memories are shaped by emotions, time, and perspective, and Marty's journal and Lorelei's autopsy overturn what the friends believed.

Looking up at the Wonder Wheel brings up memories Barb has spent years trying to bury, making her feel fifteen again.
Cole says memories are shaped by emotions, time, and perspective, and privately recalls Lorelei's death while resolving to tell the different story they agreed on.
Lorelei's autopsy report reveals she was strangled, contradicting what Cole and Barb believed since they were fifteen.
Barb and Nicolette read Marty's journal and learn Lorelei was alive after they left and was strangled by Hawk; they cry in relief.

Identity, Reinvention, and Erasure

Characters transform or conceal their origins: Nicolette becomes Cole Lennox, fake names mask predators, and Cole's glamorous surface erases traces of her past self. The novel ties reinvention to escape from Seaside, shame, fame, and the cost of leaving one's old identity behind.

Cole looks in the mirror and realizes Botox, fake lashes, hair extensions, spray tan, gel nails, and makeup have erased almost all traces of Nicolette Montes, leaving only her eyes unchanged.
Barb tells Alice that Cole Lennox won't publicly say she is from Seaside and always claims to be from Seattle; later Barb says her childhood best friend Nicolette Montes reinvented herself as Cole Lennox.
Nathan Shelley and Rebecca Welton are fake names matching Ted Lasso characters, and the couple also fake-numbered the Larsens.
Cole legally changes her name from Nicolette Montes to Cole Lennox, and whatever is left of Nicolette is stored in a shoebox at the back of her closet.

True-Crime Spectacle, Media Exploitation, and Surveillance

The story is saturated with docuseries, reality TV, tabloids, memes, and hidden cameras that turn trauma into content. Barb objects that Criminal Confessions spotlights villains rather than victims, while Cole experiences paparazzi, leaked rehab locations, manufactured storylines, and surveillance in her own home.

A Criminal Confessions season will feature the Carnival Killer; producers asked Barb and Nicolette for interviews, and Barb fears public speculation if police stay silent.
Jana Jones's docuseries and Barb's objection that Criminal Confessions spotlights villains, not victims; literary agents told Barb that true crime centering the victim is depressing.
Parker shows Cole hidden cameras in light fixtures and installs a hidden surveillance app on Cole's phone that gives room-by-room live views and recording.
Cole reflects that scandals make compelling storylines and remembers Cecily Monaco's affair leading to the first seven-figure contract for a Quan reality star; Cole hopes her own scandal will secure another season.

Captivity, Predation, and Survival

The cabin storyline dramatizes long-term captivity and the predation of women connected to reality TV. Kylie, Ingrid, and Sydney are chained, threatened, and forced to comply, while the novel tracks their resistance, trauma, and survival.

Kylie is chained to an ankle cuff in a cabin; her captor tells her the exact elapsed time every morning and brings monthly L'Oréal Excellence hair dye in shade two.
Kylie remembers Ingrid's foot being chopped off by the captor and believes Ingrid did not survive.
Kylie tells Sydney, 'You have to do what he says. You have to, or he'll kill you,' then promises it's not so bad; the narration immediately calls her a liar.
Kylie takes the poker stick and beats Owen to death while calling him kidnapper, rapist, murderer, and monster.

Small-Town Secrecy, Complicity, and Abuse of Power

Seaside protects its image and silences victims, while trusted figures abuse their power and enforce cover-ups. Hawk, a teacher, abuses Nicolette and blackmails the girls into silence, and the town's resistance to publicity links small-town loyalty to cycles of violence against women.

Jana Jones is baffled that no one in Seaside will talk about Lorelei, and Barb notes that nobody in Seaside likes to talk about the town's murders or the Wonderland scandal.
Hawk, a teacher, gave Nicolette rides home, began a sexual relationship with her, denied paternity, and then coerced her and Barb into a cover-up by threatening them with jail and ruin.
Barb says Seaside is sick and that people get murdered there; she links Ingrid Larsen's murder to Kylie Kahl's disappearance and warns that protecting Wonderland will result in more women being murdered.
Marty's journal reveals Hawk blackmailed him into helping move Lorelei's body.

Symbols and Motifs

Kylie's peridot ring

The ring connects Kylie to Ingrid and to the captor's victims, representing love from Kylie's sister, survival, and the evidence that links the disappeared women. Its return to Kylie at the end marks her rescue and the persistence of memory and care.

Kylie's ring from her sister Kaycie matches the ring on Ingrid's hand, and Ingrid was wearing it when Thing One dragged her away.
Patty says she viewed Ingrid's body and noticed Ingrid was wearing a peridot ring that was not hers.
A ring is slipped onto Kylie's finger, probably by Cole; Freddie's security clears the crowd so Kylie, her husband, and Kaycie can leave in an SUV, and Kylie looks back at the hospital where Thing One's body remains.

The Wonder Wheel and Wonderland

Wonderland and the Wonder Wheel represent the site of childhood innocence, first trauma, and cyclical return. The park's reopening brings buried memories back, and its familiar midway makes Barb feel fifteen again on the day she met Samuel Figg.

Barb looks up at the Wonder Wheel and is jarred by memories she has spent years trying to bury.
She feels fifteen again, standing in the midway with her two best friends on the day they met Samuel Figg.
Eileen Sparrow blames Wonderland's reopening for bringing 'bad juju' back to Seaside.

Polaroids

Polaroids symbolize unedited memory, evidence, and the predatory gaze. Marty's camera captures the girls, the tall man with a Polaroid becomes a clue in the disappearances, and Kylie studies Polaroids and journals to understand the captor's obsession with Lorelei.

Marty surprises them by taking a Polaroid, Nicolette takes photos with his camera, and Marty invites them to the drive-in where he works.
Kylie studies Polaroids and old journals, identifies the blond girl as possibly Lorelei, and notices a smaller second captor bringing supplies.
Barb listens to the voicemail and realizes Sydney said she was recognized by a tall man with a Polaroid, then links this to Marty Kieswetter and finds an old photo of him at Oak Meadows.
Lorelei appears in the case file: a school photo, a Polaroid taken without her permission, and crime scene and autopsy photos showing her body in the cranberry bog.

Masks and Disguises

Masks and disguises represent hidden identities, performance, and the predators' ability to hide in plain sight. They also mirror Cole's public persona and the lies characters tell about their origins.

Kylie's captor wears cheap paper masks.
Kylie thinks Cole Lennox deserves acting awards for pretending to love Jordan on camera, and Barb says Nicolette would take a role pretending to be Lorelei.
Jordan tells Cole she is a Lennox, says nobody needs to know she is from Seaside and to tell people she is from Seattle, and encourages her to do one season of Trophy Wives to launch her spray tan line.
Alice insists Owen would not lie to her about the cabin or his identity, but Barb and Cole suspect Owen is actually Marty.