Top 5 Thriller Books To Be Released On September 2025

September 2025 is poised to be a landmark month for fans of heart-pounding fiction, as a new wave of thriller novels prepares to hit the shelves. The world of literature is abuzz with anticipation, and readers everywhere are counting down the days to immerse themselves in stories that promise to keep them on the edge of their seats. This upcoming season is not just a celebration of new titles, but a testament to the enduring allure of the thriller genre, a genre that continues to evolve, surprise, and captivate audiences with every twist and turn.

The thrillers set for release this September are more than just books; they are gateways into worlds where danger lurks around every corner, secrets are buried deep, and nothing is ever quite as it seems. From psychological mind-benders to high-octane action tales, the diversity of stories on offer reflects the genre’s remarkable ability to adapt and innovate. Whether you’re a longtime devotee of suspense or a newcomer eager to experience the rush of a well-crafted plot, this season’s offerings promise something for everyone.

As the days grow shorter and the nights longer, there’s no better time to lose yourself in a gripping thriller. The upcoming releases are set to deliver unforgettable experiences, filled with suspenseful moments that will linger long after the final page is turned. So, prepare your reading lists, clear your schedules, and get ready to embark on a journey these most anticipated thrillers of September 2025. 

1. Hot Wax by M.L. Ri

This September 2025, prepare to be captivated by a novel that promises to ignite your imagination and keep your heart racing until the very last page. "Hot Wax," the latest work by acclaimed author M.L. Ri, is set to make a bold entrance into the world of thrillers, blending psychological suspense with a razor-sharp narrative style.

Where secrets simmer beneath the surface and danger is never far away. The story unfolds in a city pulsing with hidden tensions, where a mysterious series of events draws an unlikely protagonist into a web of intrigue, deception, and betrayal. With every chapter, the stakes rise, and the line between truth and illusion blurs, leaving readers questioning who they can trust and what they’re willing to risk for answers.

M.L. Ri’s storytelling shines through in this gripping tale, weaving together complex characters, atmospheric settings, and a plot that twists and turns with relentless momentum. "Hot Wax" is more than just a thriller; it’s an exploration of obsession, vulnerability, and the lengths people will go to protect what matters most.

As the release date approaches, anticipation is building for what promises to be one of the most talked-about novels of the season. Whether you’re a longtime fan of M.L. Ri or discovering their work for the first time, "Hot Wax" is a must-read that will leave you breathless and eager for more. The expected publication of this novel is on September 9, 2025 by Simon & Schuster. 

2. Other People's Houses by Clare Mackintosh

This September 2025, bestselling author Clare Mackintosh returns with a spellbinding new novel that promises to grip readers from the very first page. "Other People’s Houses" is set to be one of the most anticipated releases of the season, weaving together suspense, emotion, and the razor-sharp insight that has become Mackintosh’s trademark.

In "Other People’s Houses," Mackintosh invites us into a seemingly ordinary neighborhood where every home holds its own secrets. When a shocking event shatters the quiet routine of the community, the lives of its residents become unexpectedly intertwined. As the story unfolds, hidden truths begin to surface, and the boundaries between friend and stranger blur. With her signature blend of psychological depth and page-turning tension, Mackintosh explores the complexities of trust, privacy, and the facades we build to protect ourselves.

Richly atmospheric and deeply human, "Other People’s Houses" is more than just a thriller. It’s a compelling exploration of what happens when the walls between us come down. As anticipation builds for its release, readers can look forward to a novel that will keep them guessing, questioning, and reflecting long after the final page is turned. The expected publication of this novel is on September 16, 2025 by Sourcebooks Landmark.

3. We Love You, Bunny by Mona Awad

Acclaimed author Mona Awad returns with a novel that promises to enchant, unsettle, and captivate readers in equal measure. "We Love You, Bunny" is set to be one of the most intriguing releases of the season, blending Awad’s signature dark wit and surreal storytelling into a tale that lingers long after the final page.

Awad invites readers into a world where reality and fantasy blur, and the ordinary becomes extraordinary. The novel follows a protagonist whose life takes a strange and unexpected turn after a mysterious encounter with a figure known only as Bunny. As the story unfolds, layers of meaning and emotion are revealed, exploring themes of identity, belonging, and the power of collective obsession.

With her psychological insight, and haunting atmosphere, Mona Awad crafts a narrative that is as thought-provoking as it is entertaining. "We Love You, Bunny" promises to be a literary experience, one that challenges perceptions, sparks conversation, and leaves readers questioning what is real and what is imagined.

As anticipation builds for its release, "We Love You, Bunny" stands out as a must-read for anyone seeking a novel that is both daringly original and deeply resonant. Prepare to be swept away by Mona Awad’s latest masterpiece. This novel is expected to be released on September 23, 2025 by S&S/ Marysue Rucci Books.

4. A Killer Wedding by Joan O'Leary

Get ready for a wedding season like no other this September 2025, as Joan O’Leary unveils her latest page-turner, "A Killer Wedding." Known for her clever plotting and irresistible characters, O’Leary invites readers to a celebration where love is in the air and danger is lurking just beneath the surface.

What should be the happiest day of the year quickly unravels into a tangled web of secrets, suspicion, and murder. When a shocking crime interrupts the festivities, the bride, groom, and their guests find themselves at the center of a mystery that no one saw coming. With each new revelation, alliances shift and hidden motives come to light, turning the dream wedding into a race against time to uncover the truth.

Joan O’Leary masterfully blends humor, suspense, and romance, creating a story that is as entertaining as it is suspenseful. With her signature wit and knack for crafting unforgettable twists, she delivers a novel that will keep readers guessing until the very end.

As the release date approaches, "A Killer Wedding" is already generating buzz as a must-read for fans of cozy mysteries and thrilling whodunits alike. Prepare to RSVP for a wedding you’ll never forget, because in this celebration, everyone’s a suspect. The expected publication of this novel is on September 23, 2025 by William Morrow.

5. The Impossible Fortune by Richard Osman

Beloved author Richard Osman returns with a dazzling new novel that promises wit, warmth, and a mystery that will keep readers guessing. "The Impossible Fortune" is set to be one of the most anticipated releases of the year, blending Osman's trademark humor with a captivating tale of secrets, schemes, and the search for a fortune that may or may not exist.

Osman invites readers into a world where nothing is quite as it seems. When an eccentric millionaire’s cryptic will sets off a treasure hunt, an unlikely group of characters finds themselves drawn together by the promise of unimaginable wealth. As they follow a trail of clues through hidden histories and tangled relationships, old rivalries resurface and new alliances are forged. Every step brings them closer to the truth but also deeper into danger.

With his signature blend of clever plotting, endearing characters, and sharp social observation, Richard Osman crafts a story that is both thrilling and heartwarming. "The Impossible Fortune" is more than just a mystery; it’s a celebration of friendship, adventure, and the unexpected twists that life can bring.

As anticipation builds for its release, "The Impossible Fortune" stands out as a must-read for anyone who loves a smart, entertaining, and utterly charming mystery. Get ready to embark on a journey where the greatest treasure might just be the friends you make along the way. This novel will be released on September 30, 2025 by Pamela Dorman Books.