Can a house be born bad? That’s the question Shirley Jackson asks in her classic novel, The Haunting of Hill House. Released in 1959, the gothic novel follows four strangers who converge on a purportedly haunted house to “scientifically” seek out evidence of the paranormal. Things rapidly devolve and the characters—in particular, the novel’s lonely protagonist, Eleanor—realize, too late, that they’re in over their heads.

Upon its release, the novel sold briskly, earning Jackson a National Book Award nomination and high praise from critics. In its review, The New York Times called the story “caviar for connoisseurs of the cryptic” and described Jackson as “the finest master currently practicing in the genre of the cryptic, haunted tale.” It also caught the attention of Hollywood, and within four years MGM released a film adaptation, directed by Robert Wise. Since then, the novel has been made into a play and into a widely panned 1999 movie. On October 12, the first ever television series based on the novel will be released by Netflix.

Whether you’re getting ready to dig into the horrors of Hill House on Netflix or a fan of the original novel, here are 11 facts about The Haunting of Hill House you should know.

1. IT WAS INSPIRED BY REAL-LIFE PARANORMAL INVESTIGATORS

The National Archives UK // Public Domain

Jackson was inspired to write the novel after reading about a group of 19th century “psychic researchers” who rented a house they believed to be haunted in order to study paranormal phenomena. The researchers studiously recorded their experiences in the house, and presented them in the form of a treatise to the Society for Psychic Research. In her essay “Experience and Fiction,” Jackson explained that she was most intrigued by the way the researchers revealed their own personalities and backgrounds throughout the study. “They thought they were being terribly scientific and proving all kinds of things,” she explained. “And yet the story that kept coming through their dry reports was not at all the story of a haunted house, it was the story of several earnest, I believe misguided, certainly determined people, with their differing motivations and backgrounds.”

2. JACKSON HAD A TERRIFYING SLEEPWALKING EXPERIENCE WHILE WRITING THE NOVEL ...

Early on in the writing process, Jackson awoke one morning to find something terrifying atop her writing desk: A note, with the words “DEAD DEAD” scrawled upon it, written in her own handwriting. Jackson, who loved ghost stories but did not believe in ghosts, brushed the strange discovery off as sleepwalking. In “Experience and Fiction,” she wrote that she used the strange note to motivate her, explaining, “I decided that I had better write the book awake, which I got to work and did.”

3. ... AND MADE AN UNSETTLING DISCOVERY WHILE RESEARCHING HAUNTED HOUSES.

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Before she began writing The Haunting of Hill House, Jackson scoured magazines and newspapers for photos of houses that seemed haunted. During her research, she stumbled upon a photo of a house in California that had a particular air of “disease and decay.” She was so struck by it, she asked her mother, who lived in California, if she could find any additional information about the house. Her mother’s response shocked Jackson: Not only was she familiar with the house, but Jackson's own great-grandfather had built it. After standing empty for many years, the house had been set on fire—possibly by a group of townspeople.

4. THERE WAS ORIGINALLY MORE THAN ONE VERSION OF ELEANOR.

In A Rather Haunted Life, Shirley Jackson biographer Ruth Franklin writes that Jackson initially struggled to decide what kind of character her protagonist, Eleanor, would be. Jackson wrote three different iterations of Eleanor before settling on her final version. One, according to Franklin, was “a spinster with a swagger”—a far cry from the introverted Eleanor of the finished novel.

5. IT'S A GHOST STORY WITHOUT GHOSTS.

Jackson often referred to the novel as a “good ghost story” despite the fact that it doesn't have any overt ghosts. Instead, it’s the house itself that seems to do the haunting. In her notes for the novel, Jackson explained, “The House is the haunting.” While much of the novel is left ambiguous, Jackson was clear about the connections between Hill House and her protagonist, Eleanor. “Jackson clearly intended the external signs of haunting to be interpreted as manifestations of Eleanor’s troubled psyche,” Franklin explains in A Rather Haunted Life. At the same time, Franklin notes, “The novel makes it clear that something in the house brings out the disturbance in Eleanor.”

6. JACKSON'S HUSBAND WAS TOO AFRAID TO READ IT.

Jackson’s husband Stanley Edgar Hyman was a well-known literary critic and professor who enthusiastically read all of his wife’s books—but not The Haunting of Hill House. According to Franklin, “For the first time he refused to read her manuscript: He found the concept of ghosts too frightening.”

7. THE NOVEL HAS EARNED COMPARISONS TO THE TURN OF THE SCREW.

Since its release, critics and fans have drawn comparisons between The Haunting of Hill House and the writings of everyone from Edgar Allan Poe to Hilary Mantel. But the comparison that comes up the most is to Henry James’s classic novel The Turn of the Screw. In her introduction to The Haunting of Hill House, Laura Miller explains that the two novels share common themes, including “a lonely, imaginative young woman” and “a big isolated house.” In his 1981 book Danse Macabre, Stephen King writes, “It seems to me that [The Haunting of Hill House] and James’s The Turn of the Screw are the only two great novels of the supernatural in the last hundred years.”

8. IT WAS JACKSON'S FIRST PROFITABLE NOVEL.

The Haunting of Hill House wasn’t just Jackson’s most popular novel: It was her first profitable novel. “Hill House was a financial and critical triumph," Franklin writes. “For the first time, a novel of [Jackson’s] had finally earned back its advance and was even making a profit.”

9. SHE SOLD THE FILM RIGHTS FOR $67,500—AND USED THE MONEY TO BUY A WASHING MACHINE.

When Jackson sold the movie rights to Hill House for $67,500 (“an astronomical fee for the time,” notes Miller), it propelled her family into true financial stability for the first time. They used the money from the film to pay off their mortgage and all other debts, and to buy living room drapes, a player piano, and a washing machine and dryer.

10. ROALD DAHL SENT JACKSON A LETTER AFTER READING IT.

Carl Van Vechten, Library of Congress // Public Domain

Legendary children’s author Roald Dahl was so struck by The Haunting of Hill House, he wrote to Jackson suggesting she write for television. According to Jackson biographer Lenemaja Friedman, Dahl asked her to “consider writing a script for a television show that Ellyn Williams was doing in Britain.” It’s unclear whether Dahl himself was working on the show (his TV series Way Out premiered in 1961, two years after the publication of Hill House), but Jackson ultimately refused his request.

11. THE NOVEL HAS A LOT OF FAMOUS FANS.

Stephen King, Neil Gaiman, Guillermo del Toro, and Carmen Maria Machado are all huge fans. Del Toro included Hill House in a series of six classic horror novels he curated for Penguin, Maria Machado called it “the scariest novel I’ve ever read,” and Neil Gaiman has written that, while plenty of novels have scared him, Hill House “beats them all.” Stephen King, meanwhile, has written that Hill House has one of the best openings he’s ever read, calling it “the sort of quiet epiphany every writer hopes for.”