Keep It in the Family

In this thrilling novel from bestselling author John Marrs, a young couple’s house hides terrible secrets―and not all of them are confined to the past.

Mia and Finn are busy turning a derelict house into their dream home when Mia unexpectedly falls pregnant. But just when they think the house is ready, Mia discovers a shocking message scored into a skirting board: I WILL SAVE THEM FROM THE ATTIC. Following the clue up into the eaves, the couple make a gruesome discovery: their home was once a real-life murder house, with the evidence still concealed within the four walls.

In the wake of their traumatic discovery, the baby arrives and Mia can’t shake her fixation with the monstrous crimes that happened right above them. Tormented by the terrible things she saw, she is desperate to dig into the past to find answers.

Secrecy shrouds the mystery of the attic, but when shards of a dark truth start to emerge, Mia realises the danger is terrifyingly present. She is prepared to do anything to protect her family―but will the previous tenants stop her from discovering their secret?

John Marrs is an author and former journalist based in Northamptonshire, England. After spending his career interviewing celebrities from the worlds of television, film and music for numerous national newspapers and magazines, he is now a full-time author. Follow him at www.johnmarrsauthor.com, on Instagram @johnmarrs.author and on Facebook at www.facebook.com/johnmarrsauthor.

“One dramatic revelation after another will keep readers turning the pages. Marrs has outdone himself.” ―Publishers Weekly (Starred Review)

“Highly suspenseful, this had us gripped.” ―Crime Monthly

“Keep It in the Family is a tour-de-force of a novel. Darkly disturbing and with twists that just keep on coming, this is John Marrs at his best, bringing you a family very much at their worst. I read it in one sitting.” ―Sarah Pinborough, author of Behind Her Eyes

“Fiendishly plotted, deviously compelling.” ―Cara Hunter, author of the DI Adam Fawley series

“This is John Marrs at his very best―and that’s saying something! Dark, twisty and pulsing with ‘no let up’ tension, Keep it In The Family will have you guessing until the very end―and likely checking out your own attic just to be sure.” ―Victoria Selman, author of Truly, Darkly, Deeply

“Keep it in the Family is the perfect blend of fascinating characters, chilling details, and gasp-worthy twists. Make sure you keep the lights on because this book is what nightmares are made of.” ―Jeneva Rose, author of The Perfect Marriage

“Marrs at his best, shocking you, disturbing you and completely messing with your head.” ―Louise Beech, author of Star Girl

“I love John Marrs’s novels, and this one is (as always) a real treat. Keep it in the Family is an up-all-night thriller and a thought-provoking emotional drama.” ―B. P. Walter, author of The Locked Attic and The Dinner Guest

“I’m never going into my attic again. Thank you for freaking the hell out of me.” ―Liz Nugent, author of Our Little Cruelties

“Clever, twisted, and dark as mighty hell.” ―Lisa Jewell, author of The Family Upstairs

Keep It in the Family by John Marrs is a dark psychological thriller about how quickly a family’s life can collapse when hidden secrets, fear, and violence begin to surface. At the center of the story are Mia and Finn, a young couple who have just bought their dream house and are expecting their first child. They should be entering a happy, stable phase of life, but instead the house becomes the setting for dread almost immediately. During renovation work, a disturbing discovery is made in the property: a body hidden in the house. What begins as a shocking accident quickly turns into the first crack in what will become a nightmare. Rather than bringing clarity, the discovery exposes the fact that the house has a dark past, and that the people living in it are now trapped in something far bigger than they understood. The home, which was meant to symbolize safety and new beginnings, becomes a place of panic, suspicion, and buried horrors.

As the story moves forward, Marrs slowly reveals that this is not just a mystery about one body in one house. It is a story about generations of secrets, abuse, and the ways family violence can echo through time. The structure of the novel shifts between different timelines and perspectives, gradually showing how the past connects to the present. Finn has his own disturbing secrets, Mia is forced to question who she can trust, and other family members are drawn into the web of deceit and guilt. The novel builds tension by making it clear that every character seems to know more than they admit, and that the truth is much uglier than anyone wants to face. What appears at first to be an isolated domestic problem becomes a larger and more disturbing pattern involving control, manipulation, and murder.

One of the strongest elements of the book is the way it explores how people can live ordinary lives while carrying deeply buried darkness. The characters are not presented as simple heroes or villains. Instead, Marrs shows how trauma, selfishness, obsession, and fear can push people into terrible choices. Mia, for example, wants to believe that her relationship and family life are safe, but she is forced to confront the possibility that the person closest to her may not be who he seems. Finn is intelligent and outwardly dependable, yet the story slowly uncovers unsettling behavior and a past that does not fit the image he presents. This creates a constant sense of unease, because the reader is never fully sure what is true, who is lying, or which memories can be trusted.

The book also examines the idea that family loyalty can become dangerous when it is built on silence. In Keep It in the Family, the title itself reflects one of the novel’s central themes: abuse, guilt, and damaging behavior are often kept hidden inside families instead of being confronted. The story shows how people protect reputations, excuse wrongdoing, and tell themselves that staying quiet is easier than exposing the truth. This silence allows harm to continue. Marrs uses this idea to create a story in which the past is never really buried; it stays alive under the surface until something forces it out. The more Mia uncovers, the more she realizes that the family she thought she was building may be tied to a much older pattern of cruelty and concealment.

A major source of tension in the novel comes from the presence of children and the threat of inherited trauma. Mia’s pregnancy raises the emotional stakes because the question is no longer only about her own survival or happiness, but also about the kind of world her baby will be born into. The idea of family, which should be comforting, becomes frightening. The novel repeatedly asks whether people can ever truly escape the damage done by their parents and grandparents. Some characters are shaped by abuse they experienced as children, while others repeat the behavior they once suffered. Marrs does not present this as simple determinism, but he does show how hard it is to break cycles of violence once they are established.

The pacing of the novel is fast and highly suspenseful, with short chapters and frequent twists. Just when the reader thinks the full truth has been revealed, another layer appears. This keeps the story moving and reinforces the sense that no one is completely safe. Marrs is especially effective at using domestic details—houses, kitchens, family meals, pregnancy, childhood memories—to create horror. The fear in the book does not come only from dramatic violence; it also comes from the realization that horror can exist in places that seem normal and familiar. That contrast between ordinary family life and hidden brutality gives the novel much of its power.

As the plot reaches its darkest points, the different threads of the story begin to connect in disturbing ways. The body in the house, the family secrets, the betrayals, and the violence are all tied together. The novel reveals that people have been covering up crimes for years, and that those crimes were driven by greed, fear, and the desire to protect the family name. The final revelations reframe earlier events and force both the characters and the reader to see the truth in a new light. Some characters are exposed as far more dangerous than they first appeared, while others are revealed to have been victims for much longer than anyone realized.

By the end of Keep It in the Family, the story has become less about solving a single mystery and more about surviving the consequences of long-hidden evil. The ending is bleak but emotionally satisfying in the sense that the secrets finally come out and the truth can no longer be suppressed. Mia’s journey is one of awakening: she begins as someone trying to build a normal life and ends as someone who understands that appearances can hide terrible realities. John Marrs uses this story to explore the fragility of trust, the danger of silence, and the way family can be both a source of love and a source of destruction. It is a tense, unsettling novel that keeps the reader turning pages while also offering a sharp look at how deeply people can hurt the ones closest to them.