10 Novels About Cults, Missing Relatives and Dark Family Secrets

A missing sister. A childhood community nobody wants to discuss. An inheritance that raises more questions than it answers. These are the kinds of mysteries that make family history feel dangerous.

Novels about cults and dark family secrets work because the danger is personal. Finding the truth can mean questioning the people who raised you, the beliefs that shaped you, or the memories you have trusted for years.

These ten books explore different combinations of cults, missing relatives, coercive communities, and concealed histories. Some venture into supernatural horror; others find plenty to fear in ordinary people. The recommendations below stick to the setup and avoid revealing the major twists.

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1. The Project by Courtney Summers

Best for: A missing-sister mystery involving a charismatic religious leader.

Lo wants to reconnect with her sister Bea, whose involvement with the Unity Project has separated them. The organization presents itself as a force for good, making Lo’s suspicions difficult to prove. Her investigation brings her closer to its leader, Lev Warren, and the promises that draw people into his orbit.

The sister relationship gives this YA psychological thriller its emotional stakes. It is a strong choice if you want a cult novel that considers why belonging can feel irresistible to someone living with grief.

Find your next read: The Project

2. This Might Hurt by Stephanie Wrobel

Best for: Estranged sisters, an isolated retreat, and weaponized self-improvement.

Natalie has not heard from her sister Kit in six months. Kit has gone to Wisewood, a retreat on a private Maine island where guests surrender contact with the outside world. Then a threatening message pushes Natalie to investigate.

The premise combines a family rescue mission with the unsettling appeal of an organization promising personal transformation. If you enjoy stories in which apparently helpful rules become instruments of control, this is an especially close match. The sisters’ strained relationship adds another question: how much does Natalie understand about the person she wants to save?

Find your next read: This Might Hurt

3. The Family Upstairs by Lisa Jewell

Best for: An unexpected inheritance and a household with a disturbing past.

Shortly after her twenty-fifth birthday, Libby Jones learns more about her origins and inherits a valuable house in London. The property connects her to a decades-old discovery: three dead adults, a living baby, and missing children.

Jewell brings domestic suspense into the territory of cult-like control, showing how a home can become an enclosed world with its own destructive rules. Choose this one if you prefer intersecting perspectives and a family mystery built around the gradual reconstruction of the past.

Find your next read: The Family Upstairs

4. Our Share of Night by Mariana Enriquez

Translated by Megan McDowell.

Best for: An expansive family saga involving an occult order.

Following his wife’s death, Juan travels with his son Gaspar through Argentina. Their family is entangled with a powerful secret society, and Juan wants to protect the boy from the future its members envision for him.

This is the pick for readers who want a long, ambitious horror novel in which private cruelty connects to wealth, inherited power, and political violence. The father-and-son relationship gives the supernatural terror a deeply personal center: protecting a child becomes a struggle against an entire family legacy.

Find your next read: Our Share of Night

5. Black Sheep by Rachel Harrison

Best for: A disastrous homecoming with dark humor.

Vesper Wright left her restrictive religious community at eighteen, believing she could never return. A wedding invitation brings her back into contact with the family and beliefs she tried to leave behind.

Harrison combines an uncomfortable family reunion with supernatural horror and an irreverent sense of humor. This is a good option if your favorite part of a family-secrets novel is the returning outsider: someone who recognizes the old pressures but still has unfinished emotional business at home.

Find your next read: Black Sheep

6. Little Eve by Catriona Ward

Best for: An isolated Scottish community and apocalyptic beliefs.

On the Scottish isle of Altnaharra, a secluded clan prepares for the world’s destruction and rebirth. Young Eve longs for the distinction promised by its beliefs, while a murder investigation threatens the community’s enclosed existence.

Little Eve suits readers who enjoy gothic settings, troubled ideas of family, and mysteries about how people learn to interpret the world. Its isolation matters: when a community controls the explanations available to a child, questioning those explanations can become an act of rebellion.

Find your next read: Little Eve

7. The Children of Red Peak by Craig DiLouie

Best for: Adult survivors confronting a shared childhood nightmare.

David Young, Deacon Price, and Beth Harris survived the horrific final days of the religious community in which they grew up. Years later, the death of another survivor brings them together and forces them to revisit what happened.

This novel shifts attention from escaping a cult to living after the escape. It combines psychological suspense with supernatural horror, making it a strong choice for readers interested in conflicting memories, damaged relationships, and the enduring influence of childhood beliefs.

Find your next read: The Children of Red Peak

8. The Last Housewife by Ashley Winstead

Best for: A survivor returning to confront a powerful cult.

Shay Evans has built a new life after escaping a manipulative man’s influence during college. When she learns that her friend Laurel has died, she returns to the past and joins a true-crime podcaster’s investigation.

This is one of the list’s darkest psychological thrillers, with sexual violence and coercive abuse central to its subject matter. Its place here comes from the cult and concealed-history themes. Choose it if you want an investigation driven by a survivor’s knowledge of how manipulation works.

Find your next read: The Last Housewife

9. The God of the Woods by Liz Moore

Best for: Two missing siblings and the secrets of a wealthy family.

In August 1975, thirteen-year-old Barbara Van Laar disappears from the Adirondack summer camp owned by her family. Her older brother vanished fourteen years earlier, making the new disappearance even more troubling.

The God of the Woods earns its place through missing relatives and family secrets. Its mystery spreads beyond the Van Laars to the people who work for them, giving readers a broader view of the community surrounding the case. Pick it for historical atmosphere, multiple perspectives, and questions about whose account receives attention.

Find your next read: The God of the Woods.

10. Within These Walls by Ania Ahlborn

Best for: A true-crime investigation that becomes supernatural horror.

Struggling writer Lucas Graham receives an opportunity to investigate the story of imprisoned cult leader Jeffrey Halcomb. The arrangement takes Lucas and his daughter to a Washington house connected to Halcomb’s followers.

Ahlborn brings together a dangerous investigation and a vulnerable family, making this a fitting final pick for readers who want the cult’s history to threaten the present. Expect a much heavier horror emphasis than in the missing-person thrillers above.

Find your next read: Within These Walls

Which Book Should You Read First?

For the closest combination of a missing relative and a secretive organization, begin with The Project or This Might Hurt. For a family mystery involving a sinister household, try The Family Upstairs.

Readers seeking a larger supernatural story should consider Our Share of Night, while The God of the Woods is a strong starting point for those most interested in disappearances, family history, and social tensions.

Which of these books would you add to your reading list? Let us know in the comments.

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