Author Eri Leigh

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October Writing Prompts for Fantasy, Romance, Thriller, Mystery, and Sci-Fi

October is a month full of inspiration for writers. Whether you're working on fantasy, romance, thriller, mystery, or sci-fi, each genre offers a chance to explore the eerie, magical, or haunting atmosphere that October is known for.

Below are some prompts designed to tap into the spooky season and get your creativity flowing, especially with annual writing challenges underway. Take a moment to read through and find the ones that spark your imagination.

Fantasy

  1. Every autumn, the dead are given one day to return to the land of the living. You’ve been tasked with escorting them back before sunrise.

  2. A magical market appears only on the night of the harvest moon, offering goods from realms lost to time.

  3. The ghosts of a forgotten war rise every October. This year, they’ve chosen you to lead them.

  4. As the first frost of autumn touches the land, a hidden grove reappears, accessible only to those who dream of forgotten times. Legends say anyone who steps inside will forget their past.

  5. Every October, the leaves from the enchanted Oak of Souls fall, and each leaf holds the memory of a fallen warrior. You are tasked with gathering them before a sinister force claims their power.

  6. The autumn festival celebrates the return of the season’s spirits. But this year, the spirits aren’t leaving at dawn, and they’re starting to ask for favors only the living can fulfill.

  7. A forgotten village, hidden deep in the autumn woods, appears for one night every October. Its people offer wisdom to those who can find it—but they demand a trade no one has been willing to make.

  8. The ancient oak tree at the heart of your town is said to control the changing of the seasons. When its leaves refuse to turn, strange things begin to happen—animals no longer hibernate, crops fail, and a strange figure starts haunting the town.

  9. A warrior cursed to serve the seasons is trapped in an eternal autumn. As the world around them changes, they must find a way to break free before the final leaf falls and they are forgotten forever.

  10. In your land, autumn is the season when the veil between the human and fae realms is weakest. This year, the fae make a dangerous offer: join them for a single night of revelry, and they’ll grant one wish. But the price is steep, and they don’t intend to let you leave.

  11. Every autumn, the spirits of the forest grant one mortal a single day of magic. But this year, when your wish is granted, it awakens a forgotten power that threatens to tear the world apart.

Romance

  1. The ghost haunting your home seems oddly invested in your love life. They start matchmaking for you.

  2. A haunted house attraction brings you and your ex face-to-face again, but the real fear comes from old, unresolved feelings.

  3. On the night of the autumn equinox, an old town tradition claims that anyone who shares a kiss at midnight under the falling leaves will find their true love. You’ve always dismissed it as legend—until you’re kissed by someone you never expected.

  4. You and your former friends-with-benefits get paired together in a local pumpkin carving contest. As sparks reignite, the town’s longstanding tradition of lighting the largest pumpkin begins to stir something unexpected—an old feeling tied to lost memories.

  5. While exploring an old autumn market, you stumble upon a handwritten love letter tucked inside an antique book. It’s addressed to you—but the sender’s name doesn’t exist. You start receiving more letters, each one more urgent than the last.

  6. During a weekend getaway to an autumn cabin, you and your partner discover an ancient tree that grants a single wish to those who carve their names into it. But the wish backfires, forcing you both to face a past you’d buried beneath the falling leaves.

  7. At an annual autumn dance held in a grand, old mansion, you meet someone who seems eerily familiar. As the night wears on, you realize you’ve danced with this person before—in a dream that haunts you every October.

  8. As autumn sets in, your family’s apple orchard hosts a gathering for locals to witness the season’s first cider pressing. Among the guests is someone who once broke your heart, and the orchard seems to conspire to bring you together—whether you want it or not.

  9. After a bitter breakup, you move to a quiet autumn town to start fresh. But as the trees change colors and the town prepares for its annual bonfire, you realize your new neighbor is the ex you’ve been trying to forget.

  10. You attend a costume party during the height of autumn, where the identity of the host is a mystery. Throughout the night, you feel drawn to a stranger dressed as a figure from your favorite legend, only to discover that there might be more magic in the air than just the crisp breeze.

Thriller

  1. A townwide blackout happens on the first night of October. No one can recall the last 24 hours, but everyone wakes up with a mark carved into their palm. Whoever can solve the mystery first will be spared the curse tied to the mark.

  2. As October deepens, you receive cryptic messages, each tied to an unsolved crime from the town’s dark history. The catch? The sender wants you to solve the mystery before Halloween—or they’ll reveal your darkest secret.

  3. You’re staying in a remote autumn cabin for a writing retreat when you discover a hidden journal detailing a series of murders committed nearby. The last entry is dated tomorrow.

  4. Every October, a notorious serial killer strikes, but this year, the pattern has changed. You’re the investigator who’s been hunting them, and the killer is finally leaving clues that lead straight to your own past.

  5. During the town’s autumn parade, a local child goes missing, and you’re the only one who remembers they ever existed. The town seems bent on covering up the disappearance, and every clue you find leads deeper into a decades-old conspiracy.

  6. While hiking through the autumn woods, you find a hidden clearing filled with hundreds of empty graves. As you begin to investigate, you notice the town’s long-buried secrets resurfacing, and someone seems intent on making sure you’re next.

  7. A local urban legend about a haunted corn maze becomes all too real when a group of teenagers goes missing. You’re hired to investigate but soon realize that something inside the maze is tracking your every move.

  8. You wake up on October 1st to find that all of your digital records—social media, bank accounts, even your driver’s license—have been erased. The only clue is a voicemail from an unknown number, warning you that someone is coming for you.

  9. A haunted escape room attraction goes live in your town, but the people who enter don’t return.

  10. During an annual fall festival, a string of seemingly random deaths rocks the town. Each victim was found with an autumn leaf placed neatly on their chest, but the pattern behind the murders eludes everyone—except you.

Mystery

  1. Every autumn, a town tradition invites residents to solve a century-old mystery by following clues hidden in the falling leaves. This year, the prize is unusually high—and the mystery far more dangerous.

  2. You move into a picturesque autumn village, only to find that every October, someone vanishes. The townsfolk insist it’s nothing more than superstition, but the disappearances are real—and they’re getting closer to your new home.

  3. An old mansion is opened to the public for the first time in centuries this Halloween. On the tour, you find a hidden room no one else seems to notice.

  4. A masked figure appears in the town square every Halloween. No one knows their identity—until they disappear, and you find a mask at your door.

  5. A notorious thief has been stealing rare artifacts from museums each autumn. The police bring you in to help catch the thief, but the moment you begin investigating, the thief starts leaving messages for you—personal ones.

  6. You inherit a cabin in the woods, but the will stipulates you can only visit in October. Upon arrival, you find a series of letters hidden beneath the floorboards, each one offering cryptic clues to the whereabouts of a missing family fortune.

  7. While on an autumn road trip, you stop at a quaint, seemingly abandoned town. But as you explore, you notice the same person watching you from different locations—each time dressed as though from a different decade.

  8. A town hosts an annual scavenger hunt every October, but this year, the clues seem to point to a long-buried crime. The deeper you go, the more the lines between the game and real life begin to blur.

  9. You’re hired to catalog the belongings of a reclusive author who disappeared under strange circumstances. As you sift through their journals, you realize they were working on a mystery novel that seems to predict future events—events that are now happening.

  10. On Halloween night, you and your friends find an old, abandoned house with an unlocked door. Inside, everything is perfectly preserved, except for one thing: a ticking clock that’s counting down to midnight.

Sci-Fi

  1. In a distant future where seasons are controlled by machines, the autumn cycle malfunctions, plunging your colony into an endless fall. As the days grow shorter and colder, you discover that someone is sabotaging the system from within.

  2. On a terraformed planet, autumn brings strange phenomena—whispers in the wind, shadows that don’t belong. Your research team is sent to investigate, but the deeper you go, the more the planet itself seems to resist your presence.

  3. As humanity prepares to colonize a new planet, scientists notice that the planet’s leaves change color with the seasons, much like Earth’s autumn. But as they study the trees more closely, they realize the color shift signals a coming invasion.

  4. A space station orbiting a planet with no seasons begins to experience the signs of autumn—leaves falling, temperatures dropping. The station’s computer model claims this is impossible, but you start noticing that the station itself is changing too.

  5. In a future where time travel is controlled by a single corporation, every October brings a new anomaly—people from the past appearing in the present, disoriented and scared. Your job is to figure out why they’re showing up, and why they’re only arriving during the fall.

  6. You live in a world where the seasons are simulations, and this autumn, the system is hacked, turning the once-peaceful experience into a nightmare. Trapped inside the malfunctioning simulation, you must find a way out before the system resets.


Feel free to run with these ideas! If you’d like, tag me on social media with the story you create from one of these prompts. It’s always exciting to see how a simple prompt can grow into a short story or even a full novel. We could all start with the same prompt and end up with completely different stories—that’s the magic of writing.

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