September brings all the right vibes to spooky season.
A chill in the air that just might travel down your spine. Long nights perfect for things to go bump in the night. The changing of leaves, some of which just might look like the rusted red of dried blood in the right light.
And what better to pair with your pumpkin spice latte surrounded by this eerie vibe than a devilishly new mystery or thriller?
Here are 10 new mystery and thriller books coming out in September 2026 that are the perfect way to usher in fall.

Wildwood
Just after finding out she’s pregnant, Elinor also loses her job. So when she inherits her family’s estate, she convinces her husband to move to rural Vermont.
Wildwood is a captivating mystery to Elinor. She doesn’t know much about the home outside of brief childhood memories, and the town considers her an outsider despite her family’s history there.
Even worse, nightmares and visions haunt her, pulling her towards a past that she can’t help feel is tied to her family falling apart.
Determined to uncover the secrets of both the house and the town, Elinor finds herself on a journey back in time, where she has to confront her memories, the history of the town, and the shadows lurking in Wildwood itself.
The only question is if she will make it back alive.

I Am the Monster Under the Bed
When Willa was a senior in high school, tragedy struck her small town. Seven teenagers walked into the forest, and only Willa came out.
The town believes she killed them.
She thought she left the past behind her, but over a decade later, she finds her name splashed in a headline digging up the unsolved massacre.
To escape the attention, Willa goes back to her hometown to attend the funeral of a classmate. But the longer she stays, the stronger she feels the dark pull of the haunted forest calling her name.
Can she resist its call? Or will she become the villain her town always believed her to be?

Call Off the Dark
Helen and Tyler had a love story that movies were made of. Until his horrific murder shattered it.
In the aftermath, Helen marries Wade, an impulsive decision driven by grief. She moves to his off-grid farmhouse in rural Washington hoping to leave her heartbreak behind.
During the day, the demands of the homestead do the trick. But at night, memories turn into nightmares as Tyler invades her dreams.
When a stranger claiming to be Wade’s brother shows up, Helen’s grip on reality is shattered even more. Because Wade claims his brother died years earlier.
Has she finally gone crazy? Or is Wade manipulating her for some dark purpose?
All Helen knows is that trusting the wrong one will kill her.

The Oxford Guide to Scandal and Lies
Proving she’s more than a debutant, Ginevra Bishop follows her mother’s footsteps and enrolls at Oxford in 1951. There she meets the brooding Sidney Braithwaite, a man trying to escape the nightmares of war and start his life over.
But the British Secret Service has other plans for the duo. They think his skills and her charm are the perfect combination to flush a Soviet spy out of the university before sensitive information is discovered.
As the two chase the clues, they find themselves closer to the traitor—and each other. But their clumsy investigation means that the traitor is now looking for them.
Can they identify the spy before it’s too late?

The Pumpkin Vice Cafe
The charming hamlet of Ashland, Oregon is ushering in fall with spiced lattes and decadent treats. The owners of Torte need all the delicious help they can get as they plan for the arrival of twins and a fall wedding that promises to be unforgettable.
But when the high-end wedding planner is found dead in a creek, Jules knows it’s no accident.
Being pregnant won’t stop her from investigating. After all, there’s a killer on the loose.
And she’ll do anything to protect her babies and the town she loves.

The Mystic and the Missing Girl
After her TV psychic aunt became the scapegoat for a missing teenager, Drew Benson learned to keep her abilities a secret. She’s happy to ignore her gift and run the metaphysical shop she inherited from her aunt instead.
But when Drew’s arch-nemesis from high school decides to use her big city journalism skills to open a cold case, Drew’s ability might be the only thing that will help. Easier said than done.
She has a pile of bills, a disapproving mother, and a vandal who wants her shop gone. One wrong step and she could lose everything she’s worked so hard to build.
But the case could clear her aunt’s name and offer the teen’s family overdue answers. It might also give her the second chance that just might change everything.

Mazywood
Mazelle Washington made herself a successful career as a Black actress in the 40s and 50s. Her fame made it possible to buy the gorgeous cabin retreat deep in the California mountains.
But it also brought with it a deep rage.
50 years after her death, her grandson has also found success in Hollywood as a director, a career that in some ways is much easier thanks to people like his grandmother. It’s also just as difficult.
When Johnny brings his family to the cabin for a ski getaway, he never dreamed he’d stumble on a legacy of dark secrets.
All those years ago, a young girl made a wish. It came true.
And now Johnny has to face the truth of what happened, or risk losing his entire family.

The French Illusion
Paul and Chelsea Tanner just had a fairytale wedding and are setting off on a Honeymoon of their dreams. But when they’re kidnapped on a day trip in the French countryside, their dream turns into a nightmare.
They have no idea who would target them. Or why.
Even more disturbing, they realize that they aren’t the first victims of this crime. As they try to find clues to help answer their questions, they find themselves working with the FBI, the CIA, and French Intelligence.
It’s a case that stretches beyond borders where the answers just might hinge on a young lawyer recruited by the CIA as bait.

#AUTHORLIFE
Mackenzie “Mack” Lane quit his job as a journalist to become a full-time writer after he sells his first thriller novel for six-figures. Only, things didn’t go exactly as planned.
A few years later, his career is spiraling and he’s running out of money. His ex-wife wants to send his son to a private school and his new wife wants a baby.
When Mack is struck with a brilliant but possibly insane idea to promote his new novel, he figures that the benefits outweigh the risk.
If it succeeds, he’ll get his career back on track. But if he fails, Mack may not just lose his family or his career.
He might lose his life.

The Getaway
Billionaire Lincoln Foster’s posh Hampton estate has been the weekend getaway for three couples for years. This year starts off a little different.
A mysterious blue card appears in each couples’ room. On it are the betrayals and secrets each of them holds.
All of them have something to hide. Something they don’t want anyone to else to find out about.
Something they just might kill for.
With a hurricane bearing down on The Villa, as their secrets are exposed, each couple realizes that there is a terrible price attached to their lies. One that might only be paid with their lives.
Feature Image: Walls Republic










