Other Mommy (2026) – Book vs. Movie
Josh Malerman’s bestselling novel Incidents Around the House is widely considered one of the most uniquely unsettling horror books of the decade.
Now that Universal Pictures, Blumhouse, and Atomic Monster have officially dropped the first trailer for the film adaptation, Other Mommy, we are dying to know how the page translates to the screen.
If, like us, you don’t have the time to read the 300+ page book before the movie hits theaters on October 9, 2026, don’t worry. We have you covered.
Here is the ultimate deep dive into how director Rob Savage and screenwriter Nathan Elston altered the source material for the big screen.
SPOILER WARNING!
This Book vs. Movie Deep Dive does contain potential spoilers!
Proceed at your own risk!
The Book
Other Mommy (2026) is based on The Novel Incidents Around the House by Josh Malerman published June 25, 2024.
To eight-year-old Bela, her family is her world. There’s Mommy, Daddo, and Grandma Ruth. But there is also Other Mommy, a malevolent entity who asks her every day: “Can I go inside your heart?”
When horrifying incidents around the house signal that Other Mommy is growing tired of asking Bela the question over and over, Bela understands that unless she says yes, her family will soon pay.
Other Mommy is getting restless, stronger, bolder. Only the bonds of family can keep Bela safe, but other incidents show cracks in her parents’ marriage. The safety Bela relies on is about to unravel. But Other Mommy needs an answer.
Book vs. Movie Comparison
The POV Shift: Deeply Internal vs. Wide-Angle Terror
In the Book:
- The entire novel is written strictly from the first-person perspective of 8-year-old Bela. Readers only know what Bela sees, thinks, and feels. Her innocent voice trying to process her parents’ failing marriage alongside a supernatural entity creates a heartbreaking layer of psychological dread.
In the Movie:
- Film requires a broader canvas. While Bela (Arabella Olivia Clark) remains the emotional heart of the movie, the narrative opens up to a traditional third-person perspective. This allows director Rob Savage to build tension around the family, using wide shots to show the entity lurking in the background where Bela might not even notice it.
The Entity: An Abstract Voice vs. A Physical Doppelgänger
In the Book:
- The entity in the closet is highly abstract. It heavily relies on the reader’s imagination, shifting shapes, mimicking the mother’s voice, and using intense bedside conversations to slowly wear down Bela’s psychological defenses.
In the Movie:
- The film leans directly into “uncanny valley” physical horror. By casting Academy Award winner Jessica Chastain in a dual role, the film transforms the entity into a literal, physical doppelgänger of Bela’s mother. The trailer showcases heavy J-horror influences—distorted movements, snapping bones, and a twisted mirror image that brings a terrifying, visceral threat to the screen.
The Trajectory of the Haunting
In the Book:
- The terror stems from isolation and exhaustion. A massive twist in the novel is that the entity is not tied to the house; when the family packs up and flees to a grandmother’s home, the entity simply follows them. The horror is an intimate, inescapable psychological trap.
In the Movie:
- Hollywood pacing requires higher, more explosive stakes. While the movie keeps the book’s best rule—the parents can actually see the entity rather than ignoring the child—the haunting escalates much faster into violent, destructive set-pieces. The internal family breakdown of the book is amplified into a high-octane supernatural siege built to terrify a crowded theater.
The Verdict
Josh Malerman’s book Incidents Around the House is a masterclass in psychological claustrophobia and childlike innocence. Rob Savage’s Other Mommy takes that brilliant emotional core and wraps it in a high-intensity, visually shocking cinematic nightmare. You won’t need to read a single page to be absolutely paralyzed with fear in theaters this October!
Other Mommy (2026) – Book vs. Movie by Bobby @ Streaming Movie Night.
Official Trailer
Leave a Reply