6 New Locked-Room Mystery Novels That’ll Leave You Speechless

By Erin Roll

New locked room mysteries 2025 Novel Suspects.

From groups of guests invited to a mysterious island estate, to a victim who was seen alive at a time when they were supposed to be dead, a locked-room mystery is one of the most intriguing and fascinating varieties of mystery. It seems almost impossible for this murder or this theft to have occurred, and yet, it has.

Break out your lockpicks and crack your way into these gripping mysteries.

10 Marchfield Square

by Nicola Whyte

A petty criminal is found dead in the tiny London residential neighborhood of Marchfield Square. And a most unlikely team of sleuths is on the case: Celeste van Duren, an elderly heiress and the landlady of that neighborhood’s apartment block; Audrey, Celeste’s cleaner; and Lewis, a struggling writer and one of Celeste’s tenants. Audrey is keen to help, but Lewis can’t think of anything he’d like less than working with her. The team makes the rounds of Marchfield Square, discovering people’s secrets–and it’s clear that Audrey and Lewis will have to put their differences aside if they are to unmask the killer–or perhaps, killers?

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Smile for the Cameras

Miranda Smith

Twenty years ago, Ella Winters was a movie star on the rise, with her role in the hit horror movie Grad Night. But shortly thereafter, she left the business: officially, to care for her sick mother, but in reality, because of another kind of horror that was playing out behind the cameras. Now, with the twenty-year cast reunion of Grad Night coming up, Ella has a chance to restart her career, so she travels to the rural cabin where the movie was filmed and reunites with her castmates. But then, the brutal events of Grad Night start playing out again, this time for real.

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Hardcover

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You Are Fatally Invited

Ande Pliego

Six guests, all mystery writers, are invited to an exclusive island off the Maine coast for a weekend of murder, mystery, and mayhem. It’s all a game, of course–-until it isn’t. Mila del Angel has planned this retreat at the behest of J.R. Alastor. What J.R. doesn’t know is that Mila has an actual murder planned, targeted at a guest that she has a deadly grudge against. But things go horribly wrong when the wrong guest turns up dead. And that is only the beginning.

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Hardcover

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Dead in the Frame

Stephen Spotswood

The detecting team of Pentecost and Parker returns in this new mystery, which finds one-half of the duo being framed for a shocking murder. A wealthy industrialist–with rather ghoulish hobbies–has been murdered in 1947 New York. Police have arrested a suspect: none other than famed detective Lillian Pentecost. Everyone is convinced that Lillian is guilty, and the evidence certainly points to her. Only Will Parker, Lillian’s trusty sidekick, is convinced of Lillian’s innocence. It falls to Will to investigate the murder while Lillian is incarcerated. But with prison life taking a serious toll on Lillian’s health, and with all manner of enemies on the loose, time is quickly running out for Pentecost and Parker.

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Hardcover

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The Cleaner

Mary Watson

Nobody ever pays attention to the help. That’s what Esmie hopes as she does her work; she is a house cleaner for three wealthy families in an exclusive Irish neighborhood. But Esmie’s real work involves a mess that can’t be easily swept or mopped away. She’s out for revenge; one of her employers is responsible for ruining Esmie’s brother’s life, and when she finds out who, she intends to ruin that person’s life as well.

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Trade Paperback

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The Last Ferry Out

Andrea Bartz

Isla Colel was once a thriving tourists’ paradise, but thanks to a destructive hurricane, it is now a ghost town–or rather a ghost island, with only a handful of permanent residents and sporadic ferry service. But Abby hasn’t come to Isla Colel for a vacation; she’s determined to find the truth behind her fiancee Eszter’s tragic death. Someone on the island hints that he knows what happens, but before he can tell Abby, he disappears–and the island’s residents are surprisingly unconcerned. Abby is convinced that someone on the island is responsible for Eszter’s death, but can she find out the truth before she “disappears” herself?

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Hardcover

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6 New Locked-Room Mystery Novels That’ll Leave You Speechless

10 Marchfield Square

Format

Buy from Other Retailers:

Smile for the Cameras

Format

Buy from Other Retailers:

You Are Fatally Invited

Format

Buy from Other Retailers:

Dead in the Frame

Format

Buy from Other Retailers:

The Cleaner

Format

Buy from Other Retailers:

The Last Ferry Out

Format

Buy from Other Retailers:

What to Read Next

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Cover Reveal: Harlan Coben & Reese Witherspoon’s Thriller

The Trolley Problem & Ethical Dilemmas: How Do We Decide Who’s Good and Bad

10 Marchfield Square

Price

Price

Format

Buy from Other Retailers:

Smile for the Cameras

Format

Buy from Other Retailers:

You Are Fatally Invited

Format

Buy from Other Retailers:

Dead in the Frame

Format

Buy from Other Retailers:

The Cleaner

Format

Buy from Other Retailers:

The Last Ferry Out

Format

Buy from Other Retailers:

What to Read Next

New Mysteries & Thrillers Coming This June

Cover Reveal: Harlan Coben & Reese Witherspoon’s Thriller

The Trolley Problem & Ethical Dilemmas: How Do We Decide Who’s Good and Bad