A Head Full of Ghosts Summary: Reality TV Meets Possession
TL;DR : A Family, a Camera, and a Question No One Can Answer
In Beverly, Massachusetts, the Barrett family is running out of money.
John Barrett has lost his job, the mortgage is overdue, and his fourteen-year-old daughter Marjorie has begun behaving in ways no doctor or priest can fully explain.
Paul Tremblay’s novel A Head Full of Ghosts follows what happens when the family agrees to let a television production crew film an exorcism inside their home in exchange for payment.
Fifteen years later, the surviving daughter sits down with an author to recount those months, and the account she gives is far from simple.
The book moves between childhood memory, television footage, blog essays, and interview transcripts, and it never fully settles the question at its center.
Key points:
- The setup: John Barrett loses his job; Marjorie’s behavior escalates; a priest and a production company arrive.
- The structure: Adult Merry narrates, while blog posts by “Karen Brissette” analyze the show’s episodes.
- The tension: Mental illness, religious belief, and media manipulation compete for the same explanation.
- The outcome: A televised exorcism, a fatal family tragedy, and one survivor who cannot verify her own memories.
You May Also Like: I’ll Watch Your Baby Summary & Book Review: A Haunting Reckoning with History’s Ghosts
Who Will Enjoy This Book
- Readers of psychological horror that withholds easy answers
- Fans of possession stories that question the possession itself
- Readers interested in reality television, media ethics, and spectacle
- Those who prefer unreliable narrators and non-linear structure
A Head Full of Ghosts Summary (Spoilers Ahead)
Spoiler warning: the following section describes the plot, including the ending.
Twenty-three-year-old Meredith “Merry” Barrett returns to her abandoned childhood home with best-selling author Rachel Neville. Rachel is writing a book about The Possession, the reality series that documented the Barrett family’s collapse.
Merry is uneasy about the project. She tells Rachel that her memories feel tangled with footage, dreams, and internet rumor. In A Head Full of Ghosts, this uncertainty shapes everything that follows.
The story rewinds fifteen years. Merry is eight, and her sister Marjorie is fourteen. Their father, John, has been laid off from a toy factory after nineteen years.
Money is gone, and the house is at risk. Around the same time, Marjorie begins telling grim stories about the 1919 Boston Molasses Flood and plants that grow through human skin.
Her behavior escalates. She screams in multiple pitches at night and clings to her bedroom wall. She vomits green liquid at dinner and cuts herself in the hallway.
John turns to a local priest, Father David Wanderly. Father Wanderly connects the family with Sixth Finger Productions, which offers money to film a six-episode exorcism series for the Discovery Channel.
Cameras go up on the ceilings. The sunroom becomes a black-draped confessional room. Actors arrive to film reenactments, and show writer Ken Fletcher hands young Merry her own handheld camera.
In the basement, Marjorie tells Merry a different story. She claims she is not possessed by Satan but by “ideas,” and that she is faking her symptoms to earn the family money and punish their parents.
Her behavior does not become less frightening. During an evaluation, Marjorie cites Vatican exorcism protocols and Lovecraftian entities, then shows deep red scratches across her stomach.
Outside, protesters gather and the media presence grows. John attacks an extremist demonstrator and is arrested.
The televised exorcism takes place in Marjorie’s freezing bedroom. Father Wanderly recites the Litany of Saints while a desk drawer opens and shuts on its own and thumping sounds come from beneath the floor.
Marjorie bites assistant priest Father Gavin’s forearm, tearing flesh down to his elbow. She breaks free of restraints that her mother had only pretended to tie, then runs into the hallway.
She calls out to Merry, climbs the second-floor railing, and jumps into the foyer. The episode cuts to black.
The finale draws record ratings. One month later, six days before Christmas, Marjorie shows Merry news articles about fathers who killed their families after financial ruin.
Marjorie claims John has built a basement shrine and bought a jar of potassium cyanide to poison them. She proposes they spike their mother’s spaghetti sauce with the powder to knock their parents out and escape to the police.
Merry pours the powder into the simmering sauce. At dinner, Marjorie eats a large portion of it herself, alongside Sarah and John.
All three die at the kitchen table from respiratory failure. Merry realizes she has been manipulated.
Three days later, police break in and find eight-year-old Merry sitting beneath the kitchen table among the bodies of her family. In the present, adult Meredith tells Rachel she cannot be certain whether Marjorie was mentally ill, possessed, or both.
What she does know is that she was eight years old and was used to kill her family. Paul Tremblay leaves the question of Marjorie’s condition unresolved to the final page.
Continue Reading: Imaginary Friend Summary: Chbosky’s Horror Explained
Summary by Chapter (Spoilers Ahead)
This section offers a brief summary of each chapter for readers who want to see how the book is structured.
A Head Full of Ghosts contains 26 chapters across 3 parts. Chapters 2, 14, and 23 are blog posts written by “Karen Brissette.”
Part One
Chapter 1: Adult Merry returns to her abandoned childhood home with author Rachel Neville. Merry reflects on Marjorie, who has not aged in her memory, and begins describing her sister before the events began.
Chapter 2 – THE LAST FINAL GIRL: Blogger Karen Brissette introduces The Possession, a six-episode reality series from the post-recession era. The post covers John Barrett’s layoff and the family’s financial collapse that led them to sign the contract.
Chapter 3: Merry tells Rachel there was no single starting point for Marjorie’s illness. She recalls a childhood memory of her parents at a Marriage Encounter retreat and notes how hard it is to separate fact from family lore.
Chapter 4: Eight-year-old Merry plays in her cardboard playhouse and visits Marjorie’s room for a story. Marjorie tells a dark tale about the 1919 Boston Molasses Flood and reveals she drew drowning animals inside Merry’s book.
Chapter 5: Merry sets traps in her bedroom using a robe belt and a juice jug, then builds cardboard cameras. Her book disappears anyway, and she finds a green crayon note from Marjorie describing nighttime visits.
Chapter 6: The family eats spaghetti dinner while John tries to introduce grace. Marjorie smears sauce on her chin and asks her father how he can be sure spirits in heaven are not disguised demons.
Chapter 7: Merry sneaks into Marjorie’s room for the promised story about “growing things” overtaking the world. Marjorie then screams at Merry to remember all her stories because ghosts are filling her head.
Chapter 8: At soccer practice, Merry confesses everything to Sarah, who records notes for Dr. Hamilton. Reassured, Merry kicks a teammate in the shin and dribbles past her.
Chapter 9: Multi-pitched screaming wakes the house, and John forces Marjorie’s locked door open. Merry sees Marjorie clinging high on the wall like a spider before Sarah sends her back to bed.
Chapter 10: Merry eavesdrops as her parents argue about medical bills and insurance. John admits he took Marjorie to see Father Wanderly instead of Dr. Hamilton, describing a breakdown in the car.
Chapter 11: Marjorie lounges in the sunroom until Merry asks if she is texting Father Wanderly. Marjorie threatens to tear out Merry’s tongue, then pretends it was a joke and hums “Gloomy Sunday.”
Chapter 12: Merry compares the show’s reenactments to the real dinner where Marjorie’s skin turned gray. Green vomit oozes onto Marjorie’s plate as she speaks in multiple voices and slashes John’s hand.
Chapter 13: Merry opens her parents’ bedroom door and finds Marjorie alone on the bed in a bloody act of self-harm. Marjorie stumbles into the hall covered in blood, urine, and feces before collapsing.
Part Two
Chapter 14 – THE LAST FINAL GIRL: Karen Brissette analyzes the show’s reenactments and compares them to classic horror films. The post ends with surveillance footage of Marjorie saying, “I’m Marjorie Barrett, and I need help.”
Chapter 15: Present-day Merry hosts Rachel at her South Boston condo and shows her the media room full of horror films. Merry reveals she is Karen Brissette and agrees to describe what happened in the basement.
Chapter 16: The production crew installs ceiling cameras and builds the confessional room. In the basement, Marjorie claims she is possessed by “ideas” rather than Satan and has been faking to save the family.
Chapter 17: Ken Fletcher gives Merry a handheld camera on the night of the show’s premiere. That night, Merry records scratching noises and watches her cardboard playhouse collapse as a figure moves toward Marjorie’s room.
Chapter 18: Merry pretends to be sick and interviews John in the kitchen, a moment she recalls as the last time he seemed happy. A family meeting introduces Dr. Navidson, who will evaluate Marjorie.
Chapter 19: Dr. Navidson evaluates Marjorie, who mocks the room and cites Vatican rules and Lovecraftian entities. She lifts her shirt to reveal self-inflicted scratches, and Sarah and John fight over calling the hospital.
Chapter 20: The show airs episodes built from the evaluation footage, and the protest crowd outside grows. Marjorie’s symptoms go into remission, but she warns that if Merry misses the exorcism, someone will get hurt badly.
Chapter 21: On the morning of the exorcism, John fights extremist protesters and is arrested. Sarah bails him out, the family eats Chinese takeout, and the priests arrive that evening.
Chapter 22: The exorcism proceeds with Marjorie strapped to her bed, though Sarah only pretend-ties the restraints. Marjorie bites Father Gavin’s arm, breaks free, and leaps over the second-floor railing as the camera cuts to black.
Read Also: Revival by Stephen King Summary — A Masterful Descent into Cosmic Horror
Part Three
Chapter 23 – THE LAST FINAL GIRL: Karen Brissette analyzes the series finale, the maze-like layout of the house, and the “Yellow Wallpaper” symbolism. She notes that one month after the finale aired, John Barrett poisoned his entire family.
Chapter 24: Merry meets Rachel for their final interview at a coffee shop. Rachel reveals John exchanged hate-filled emails with an extremist pastor, and that police never found the source of the cyanide.
Chapter 25: Merry recounts December 19, when Marjorie showed her articles about fathers who killed their families. Marjorie described a jar of potassium cyanide and a plan to spike the spaghetti sauce, and Merry poured the powder in.
Chapter 26: Merry finishes her account, explaining that police found her three days later beneath the kitchen table. She acknowledges the ambiguity of Marjorie’s condition but accepts that she was manipulated into poisoning her family.
Characters in This Book
| Character | Role |
|---|---|
| Meredith “Merry” Barrett | The narrator, aged eight during the events and twenty-three in the present-day interviews. |
| Marjorie Barrett | Merry’s fourteen-year-old sister whose behavior is the focus of the exorcism and the television series. |
| John Barrett | The sisters’ father, laid off from a toy factory, who arranges the reality television contract. |
| Sarah Barrett | The sisters’ mother, the family’s sole earner, who opposes the television production. |
| Rachel Neville | A best-selling non-fiction author interviewing adult Merry for a book about The Possession. |
| Karen Brissette | The pseudonym under which adult Merry writes the meta-horror blog The Last Final Girl. |
| Father David Wanderly | The parish priest who links the family with the production company and performs the exorcism. |
| Father Gavin | The assistant priest who is bitten during the exorcism. |
| Ken Fletcher | The lead writer for The Possession who gives Merry her handheld camera. |
| Barry Cotton | The director and producer for Sixth Finger Productions. |
| Dr. Navidson | A Christian psychiatrist brought in to evaluate Marjorie for possession. |
| Dr. Hamilton | Marjorie’s secular psychiatrist, who declines to take part in the show. |
| Auntie Erin | John’s sister, who babysits the girls and takes Merry in after the tragedy. |
Books Like A Head Full of Ghosts
- The Exorcist by William Peter Blatty: The foundational possession novel that Tremblay’s book references and reworks, built around a mother seeking help for her daughter.
- We Have Always Lived in the Castle by Shirley Jackson: An isolated family, a young unreliable narrator, a close sisterly bond, and a fatal poisoning at the center.
- House of Leaves by Mark Z. Danielewski: A layered, meta-horror novel that combines media analysis with a house that distorts space.
- My Best Friend’s Exorcism by Grady Hendrix: Possession horror filtered through teenage friendship and 1980s pop culture.
- Come Closer by Sara Gran: A short psychological novel cited within Tremblay’s text that keeps the line between breakdown and possession unclear.
- Rosemary’s Baby by Ira Levin: Domestic horror in which a family’s private life becomes the site of an ambiguous supernatural threat.
- The Last Exorcism (film novelization) and found-footage horror fiction: Shares the reality-television and documentary framing that structures the Barretts’ story.
Book Details at a Glance
- Genre & Subgenre: Horror / Psychological Horror, Demonic Possession, Modern Gothic, Meta-Horror
- Core Narrative Tropes: Unreliable narrator, possession versus mental illness, found footage and reality TV satire, doomed Gothic family
- Tone & Atmosphere: Unsettling, claustrophobic, melancholic, tense, satirical
- Primary Conflict: The Barrett family’s disintegration amid Marjorie’s breakdown, John’s religious fervor, and a reality television production inside the home
- Pacing Style: Non-linear dual timeline mixing interview transcripts, childhood recollection, blog essays, and show transcripts
- ISBN: 978-0062363237
- Pages: 304
- Book Structure: 26 chapters across 3 parts
